在Windows操作系统中,当用户按下"PrintScreen"按钮后,Windows自动将当前屏幕的图像拷贝到系统剪贴板中,这时可以通过"画笔"这个小程序将剪贴板中的内容保存成图像文件,可以看出,如果需要将当前屏幕保存下来还是比较麻烦的,能否可以自己编写一个应用程序,自动将当前屏幕的内容保存到一个图像文件中去呢?这个答案是肯定的,本实例应用程序就是利用通用的热键管理DLL库实现的热键功能,在收到热键通知后截取屏幕的内容并保存到bmp文件中。例如我们设置图片保存路径为c:\,热键为F9 + Control,然后按Change按钮设置好热键,那么当我们按下CTRL+F9后,当前界面将以BMP图像文件的格式被保存在C:\目录下。程序编译运行后的界面效果如图一所示:
?PLPf>e
I]|Pq 一、实现方法
oE@a'*.\ 3l]lwV 热键管理DLL实际上是一个键盘钩子,由它来监视系统的键盘事件。如果有和程序登记符合的按键组合就通知该程序的窗口。为了应用方便,本实例把它做成了一个标准的管理库来为其它的程序通过热键服务,它有两个输出函数:AddHotkey()和DeleteHotkey(),程序只需要调用这两个函数就可以了,如果编译之后不用改变热键,则只需要AddHotkey就可以了。DLL中的所有的全局变量都放在一个共享段中,定义如下:
'B$yo] &/Z
/Y ] #pragma data_seg("shareddata")
J[&@PUy HHOOK hHook =NULL; //钩子句柄
5"VTK UINT nHookCount =0; //挂接的程序数目
7jrt7[{ static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码
t
mntp static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1
wKh4|Ka static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey
N>uRf0E> static int KeyCount =0;
O *C;Vqt static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1
2F;y;l% #pragma data_seg()
E#34Wh2z s3N'02G 关于共享段,有几点重要的说明:一是必须在链接选项里指定该段为共享:一种方法是在project->settings->link->object/library中加上/section:shareddata,rws;第二种方法是在def文件的sections里加上一句shareddata read write shared;第三种指定共享段的方法在程序里加上一句#pragma comment(linker,"section:shareddata,rws")。二是所有的变量必须初始化,否则链接程序会把它放到普通数据段。三是如果不初始化变量,需要在段外用"__declspec(allocate("shareddata")) 变量类型 变量名"的方式定义。
MBK^FR-K [>3./YH` DLL中的两个输出函数分别用来添加/删除热键,函数代码如下:
#!B4 u?"m \0gis# BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR
B^=-Z8 cKey,UCHAR cMask)
pp?D7S {
.N;=\C* BOOL bAdded=FALSE;
;._
l0Jw for(int index=0;index<MAX_KEY;index++){
DDQx
g if(hCallWnd[index]==0){
E,Z$pKL? hCallWnd[index]=hWnd;
5PCqYN(:B HotKey[index]=cKey;
`?H]h"{7Q HotKeyMask[index]=cMask;
:9afg bAdded=TRUE;
t|?ez4/{z KeyCount++;
j a[Et/r break;
J`Q>3]wL }
$GV7o{"& }
3m[vXr? return bAdded;
[|wZ77\ }
sfH_5
#w //删除热键
5&g@3j] BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask)
Oamg]ST {
]OhiYU4 BOOL bRemoved=FALSE;
$QF{iV@6d4 for(int index=0;index<MAX_KEY;index++){
f^ZRT@`O if(hCallWnd[index]==hWnd){
Rr$-tYy6 if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){
Oxnp0 s hCallWnd[index]=NULL;
FgnTGY} HotKey[index]=0;
t^-d/yKt0w HotKeyMask[index]=0;
R+:yVi[F]U bRemoved=TRUE;
_%Bi: HG0 KeyCount--;
=[ 46`-_ break;
z|uDy2 }
.#!lP/.eQP }
Y|m+dT6 }
jwe *(k]z return bRemoved;
lgAoJ[ }
l9~e".
~' h8j.( B4/>H| DLL中的钩子函数如下:
$p8xEcQdU# T~?Ff|qFC LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam)
' {OgN}'{ {
T"Y+m-<% BOOL bProcessed=FALSE;
v~+(GqR=+ if(HC_ACTION==nCode)
g'f@H-KCD {
tIi&;tw] if((lParam&0xc0000000)==0xc0000000){// 有键松开
BR_1MG'{)$ switch(wParam)
Z#jZRNU%ox {
pQ" >UL* case VK_MENU:
iU918!!N MaskBits&=~ALTBIT;
LP^$AAy break;
z
kP_6T09 case VK_CONTROL:
f5"k55 } MaskBits&=~CTRLBIT;
YMyfL8bO break;
~NgA case VK_SHIFT:
b6M[q_ MaskBits&=~SHIFTBIT;
tFn)aa~L break;
unzr0x
{ default: //judge the key and send message
`7Q<'oK break;
)m+W
j }
+^ac'Y)A for(int index=0;index<MAX_KEY;index++){
P:S .~Jq if(hCallWnd[index]==NULL)
\w>y`\6mX continue;
hFUlNJ if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits))
5~U/ {
2W(s(-hD SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP);
I|!OY`ko bProcessed=TRUE;
hag$GX'2k }
c]-<vkpV }
Gu,wF(x7A }
\7eUw,~Q> else if((lParam&0xc000ffff)==1){ //有键按下
,t744k') switch(wParam)
c]<5zyl"j1 {
0o4XUW case VK_MENU:
k'Hs}z eNn MaskBits|=ALTBIT;
&B;~
break;
p>N(Typ0b case VK_CONTROL:
*R,5h2; MaskBits|=CTRLBIT;
`hm-.@f,9 break;
?<,l3pwqa case VK_SHIFT:
A2FYBM`Q&D MaskBits|=SHIFTBIT;
qwcD`HV, break;
\K{
z default: //judge the key and send message
]c*4J\s break;
qZh/IW }
=*.~BG for(int index=0;index<MAX_KEY;index++){
C=xa5Y if(hCallWnd[index]==NULL)
P; no? continue;
,Vax&n+J if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits))
}#+^{P3 ; {
Po0A#Z l SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN);
kazzVK5x bProcessed=TRUE;
0> E r=,e }
rXq.DvQ }
c#]4awHU }
?R
'r4P, if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地
@4C% +- for(int index=0;index<MAX_KEY;index++){
qkqIV^*R if(hCallWnd[index]==NULL)
Q\vpqE!9 continue;
zI uJ-8T" if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0))
=%O6:YM
SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam);
fbvL7*
( //lParam的意义可看MSDN中WM_KEYDOWN部分
/s?`&1v|r }
A\DCW }
DfD&)tsMQ }
^
+\dz return CallNextHookEx( hHook, nCode, wParam, lParam );
#%2rP'He }
5;WH:XM 3 \,4 ]l|
抓图程序是一个基于对话框的程序,它在建立对话框的时候调用前面的DLL,登记热键,因此需要将hook.lib添加到工程里,在程序里给出两个DLL函数的定义,也可以写个头文件,再包含进来以下代码:
7EEl+;wK LOYk9m BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask);
G!##X: 6' BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask);
6|=f$a MjRHA^b 为了添加应用程序对热键通知事件的响应,程序中用的办法是重载WindowProc()函数,该函数代码如下:
$HzBD.CF|x =XQ%t
@z0 LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam)
RP|`HkP-2 {
DCa^
u'f if(message==WM_HOTKEY&&lParam==WM_KEYDOWN)
-i|}m++ {
Gz0]}]A //lParam表示是按下还是松开,如果有多个热键,由wParam来区分
3=[mP,pLh SaveBmp();
`}\
"Aw c return FALSE;
8Fh)eha9f }
>'$Mp < …… //其它处理及默认处理
Y@iS_lR }
&-w
Cvp7 tOD6&< 3}1u\(Mf 将屏幕图像保存到BMP文件中的任务是由函数SaveBmp()来完成的,具体实现参见代码部分。另外为了顺利实现屏幕抓图,程序中还实现了"托盘"功能,由于这一部分本书在实例中已经专门介绍过了,所以不再赘述,读者朋友可以参考相关实例。
pki%vRY r5/0u(\LB 最后需要提醒读者朋友们注意的是,源程序的编译与使用时要先编译hook.dll并将其放在系统目录(win2000/NT是system32,98/ME是system),然后编译对话框程序运行即可。
FV!q!D T::85 二、编程步骤
\@zHON( gJ{)-\ 1、 启动Visual C++,生成一个DLL项目和一个基于对话框的应用程序项目,并将两个项目分别命名为"Hook"和"Capture";
Fo_sgv8O< H?Wya.7 2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数;
gQuw1 [|L<_.8 3、 在"Capture"项目中按照图一所示设置对话框的界面,具体设置参见代码部分;
B6 ;|f'e! } OR+Io 4、 使用Class Wizard在"Capture"项目中添加按钮的鼠标单击消息响应函数,并重载对话框的WindowProc()函数;
j (d~aqW Ml5w01O 5、 添加代码,编译运行程序。
>=>2m2z= v?$:@9pAk 三、程序代码
:cECRm* JbbzV> ///////////////////////////////////// Hook.h : main header file for the HOOK DLL
"sCRdx]_ #if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_)
+\A,&;!SR #define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_
Qv-_ jZ #if _MSC_VER > 1000
rlLMT6r.8 #pragma once
C!!M%P #endif // _MSC_VER > 1000
6 "sSo j #ifndef __AFXWIN_H__
B9 uoVcW #error include 'stdafx.h' before including this file for PCH
yyJf%{ #endif
]m<$} #include "resource.h" // main symbols
I236RIq class CHookApp : public CWinApp
(ZizuHC {
F>l]
9!P|m public:
RqrdAkg CHookApp();
P@B] // Overrides
reWot&;
// ClassWizard generated virtual function overrides
59A}}.@?m //{{AFX_VIRTUAL(CHookApp)
)akoa,#%6c public:
t:Q*gWRh virtual BOOL InitInstance();
A/s?x>QA virtual int ExitInstance();
%$L{R //}}AFX_VIRTUAL
f}e`XA? //{{AFX_MSG(CHookApp)
ZBthU")? // NOTE - the ClassWizard will add and remove member functions here.
<'*LRd$1 // DO NOT EDIT what you see in these blocks of generated code !
0~S^Y1hH //}}AFX_MSG
;^*W+,4WB DECLARE_MESSAGE_MAP()
*)Zdz9E'1( };
f6Ah6tb LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam);
CTa57R BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask);
oc`H}Wvn BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask);
Otuf]B^s BOOL InitHotkey();
>bW#Zs,6 BOOL UnInit();
`^&OF uee #endif
abj Q)=u Q
&JUt( //////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL.
KRzAy)8 #include "stdafx.h"
Yq
KCeg #include "hook.h"
%u'ukcL7 #include <windowsx.h>
6&x@.1('z #ifdef _DEBUG
0,")C5j #define new DEBUG_NEW
ZE}}W_ #undef THIS_FILE
:I#V. static char THIS_FILE[] = __FILE__;
&QgR*,5eo #endif
Rm( "=( #define MAX_KEY 100
}7Q% 6&IR #define CTRLBIT 0x04
5b*C1HS@X #define ALTBIT 0x02
T~e.PP #define SHIFTBIT 0x01
|{ip T SH #pragma data_seg("shareddata")
L8B!u9% HHOOK hHook =NULL;
77Y/!~kd UINT nHookCount =0;
w?[u pn:K static UCHAR HotKey[MAX_KEY] = {0}; //hotkey
Gc|idjW4 static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT
K"MX! static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey
y6a3tG static int KeyCount =0;
?@86P|19 static UCHAR MaskBits =0; //00000 Ctrl Alt Shift
%ET+iIhK #pragma data_seg()
~DwpoeYX HINSTANCE hins;
XL^GZ void VerifyWindow();
<5051UEu BEGIN_MESSAGE_MAP(CHookApp, CWinApp)
2+XAX:YD //{{AFX_MSG_MAP(CHookApp)
})%{AfDRF // NOTE - the ClassWizard will add and remove mapping macros here.
h_'*XWd@ // DO NOT EDIT what you see in these blocks of generated code!
AwR=]W;j //}}AFX_MSG_MAP
5H^(2w END_MESSAGE_MAP()
o]V^};B F^:3?JA_ CHookApp::CHookApp()
75lA%|
*X {
N!}f}oF // TODO: add construction code here,
g_bLl)g< // Place all significant initialization in InitInstance
]-#DB^EQ }
ob]w;" W>r+h-kR CHookApp theApp;
J&_n9$ LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam)
RA 6w}:sq7 {
9(Xn>G'iT BOOL bProcessed=FALSE;
Di{de` if(HC_ACTION==nCode)
wCBplaojJ {
:ws<-Qy if((lParam&0xc0000000)==0xc0000000){// Key up
(bS&D/N. switch(wParam)
}SZd {
3v-~K)hl? case VK_MENU:
Vurqt_nb MaskBits&=~ALTBIT;
%cn<ych
G break;
SpBy3wd case VK_CONTROL:
DEgXQ[ MaskBits&=~CTRLBIT;
Lg hfM"g break;
u ga_T case VK_SHIFT:
6 u6x MaskBits&=~SHIFTBIT;
A#,ZUOPGH break;
fz_r7? default: //judge the key and send message
%]i15;{X break;
xE}>,O|'q }
8ao _i=&x for(int index=0;index<MAX_KEY;index++){
UiNP3TJ'L if(hCallWnd[index]==NULL)
V;=cwy)I continue;
6y<EgYzdE if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits))
#vlgwA {
Y]a@j! SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP);
%C]>9." bProcessed=TRUE;
Fr-SvsNFB }
7tp36 TE }
]4e;RV-B }
zt%Mx>V@ else if((lParam&0xc000ffff)==1){ //Key down
v$9y,^p@e
switch(wParam)
pgo$61 {
DmcZta8n] case VK_MENU:
#dHa,HUk MaskBits|=ALTBIT;
xIn:ZKJ' break;
i.#:zU%o case VK_CONTROL:
I/N *gy?* MaskBits|=CTRLBIT;
j>kqz>3 break;
y();tsWqc case VK_SHIFT:
i
XN1I MaskBits|=SHIFTBIT;
W,u:gzmhw break;
[Rb+q=z# default: //judge the key and send message
q3`u1S7Z7 break;
zuCSj~ }
,!9zrYi} for(int index=0;index<MAX_KEY;index++)
:!QAC@
{
mE[y SrV if(hCallWnd[index]==NULL)
V]^$S"Tv continue;
X8\GzNE~R if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits))
HaYo!.(Fv {
;*J SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN);
/L3: bProcessed=TRUE;
B5QFK }
6LhTBV }
v:#tWEbo- }
[F7hu7zY8 if(!bProcessed){
KPki}'GO for(int index=0;index<MAX_KEY;index++){
CC`JZ.SO if(hCallWnd[index]==NULL)
7EJ+c${e.- continue;
$cgcX if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0))
Hr C+Yjp SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam);
tJmTBsn }
a'T;x`b8U, }
dN6?c'iN?2 }
7p[n return CallNextHookEx( hHook, nCode, wParam, lParam );
qP
,EBE }
7 8,n%=nG X3&
Jb2c2 BOOL InitHotkey()
^J{:x {
d-%hjy3N if(hHook!=NULL){
Sjj6q` nHookCount++;
!u hT return TRUE;
k7^5Bp8= }
,%y/kS] else
e+|sSp A hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0);
p<%d2@lp if(hHook!=NULL)
_0I@xQj- nHookCount++;
!IR6
,A\ return (hHook!=NULL);
@VI@fN }
@6]JIJE BOOL UnInit()
{..6>fS {
Ul# r if(nHookCount>1){
N>E_%]C h nHookCount--;
3' 'me return TRUE;
IGgL7^MF }
)5H?Vh>36 BOOL unhooked = UnhookWindowsHookEx(hHook);
Fzcwy V
if(unhooked==TRUE){
}0 ?3:A nHookCount=0;
%2h>-.tY hHook=NULL;
O0:q;<>z }
|BYRe1l6l return unhooked;
ykJ>*z }
$Kd>:f=A 7$#u BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask)
AFn7uW!9Gw {
HKe K<V BOOL bAdded=FALSE;
BLFdHB.$T for(int index=0;index<MAX_KEY;index++){
=|9!vzG4 if(hCallWnd[index]==0){
^^Vg~){4 hCallWnd[index]=hWnd;
d_CT$ HotKey[index]=cKey;
VaPG-n>Vf HotKeyMask[index]=cMask;
eH,or ,r bAdded=TRUE;
{)Xy%QV KeyCount++;
j1Ezf=N6` break;
62u4-}JzF }
?4uL-z](V }
cb bFw return bAdded;
s[ N@0 }
_Ey5n!0: m+9#5a- BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask)
;a3}~s {
|a@L}m BOOL bRemoved=FALSE;
0 {mex4 for(int index=0;index<MAX_KEY;index++){
k=^xVQuI if(hCallWnd[index]==hWnd){
?cZlN! if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){
1x^GWtRp hCallWnd[index]=NULL;
V6Dbd"
i9 HotKey[index]=0;
tp|d*7^i HotKeyMask[index]=0;
$Q0n bRemoved=TRUE;
31)&vf[[ KeyCount--;
fy$1YI>!Q break;
6B-16 }
t,'<gI }
JtZ7ti }
=M-p/uB] return bRemoved;
AwN!;t_0+N }
!'Kjx LQ% `c void VerifyWindow()
\NC3'G:Ii {
Mihg: for(int i=0;i<MAX_KEY;i++){
P;*(hY5& if(hCallWnd
!=NULL){ ,?3G;-
if(!IsWindow(hCallWnd)){ E"0>yl)
hCallWnd=NULL; GthYzd:'hJ
HotKey=0; Ho%CDz
z
HotKeyMask=0; Gh$^ {
KeyCount--; I:.s_8mH}
} 0YHFvy)
} Dh*n!7lD`
} g&.=2uP
} I@3MO0V^
e(yh[7p=
BOOL CHookApp::InitInstance() n`KY9[0U=
{ @pxcpXCy
AFX_MANAGE_STATE(AfxGetStaticModuleState()); G&dKY h\
hins=AfxGetInstanceHandle(); OJxl<Q=z
InitHotkey(); }\LQ3y"[
return CWinApp::InitInstance(); W>LR\]Ti@
} D,6:EV"sa
snJ129}A
int CHookApp::ExitInstance() Dzbz)Zst
{ &wX]_:?
VerifyWindow(); cnLro
UnInit();
3CJwj
return CWinApp::ExitInstance(); cNH7C"@GVu
} _G0x3
##{taR8
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file ~5g ~;f[4
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) `{Ul!
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ [
3HfQ
#if _MSC_VER > 1000 c9Yrw^
#pragma once 8_F1AU? u
#endif // _MSC_VER > 1000 <QvOs@i*
+v\oOBB)
class CCaptureDlg : public CDialog 9B4&m|g
{ g+lCMW\
// Construction =T_g}pu
public: Xeajxcop#
BOOL bTray; #b`ke/P
BOOL bRegistered; u4j5w
BOOL RegisterHotkey(); Q20%"&Xp]
UCHAR cKey; P%zK;#8V
UCHAR cMask; CWlw0X
void DeleteIcon(); M`>E|"<
void AddIcon(); rGO8!X 3d
UINT nCount; :-'qC8C
void SaveBmp(); ]{iQ21`a-
CCaptureDlg(CWnd* pParent = NULL); // standard constructor #*}+J3/
// Dialog Data v:U-6W_)|
//{{AFX_DATA(CCaptureDlg) 4Up/p&1@
enum { IDD = IDD_CAPTURE_DIALOG }; }'.m*#Y
CComboBox m_Key; 4z? l
BOOL m_bControl; ^s=8!=A(
BOOL m_bAlt; C]#,+q*
BOOL m_bShift; 9gFUaDLo
CString m_Path; $?Wb}DU7_L
CString m_Number; ys~x$
//}}AFX_DATA 6 r"<jh #
// ClassWizard generated virtual function overrides pUTr!fR
//{{AFX_VIRTUAL(CCaptureDlg) kl`W\t F
public: HhpDR
virtual BOOL PreTranslateMessage(MSG* pMsg); weQ_*<5%
protected: 8RX&k
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support yw!{MO
virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); 2?5>o!C
//}}AFX_VIRTUAL Qd-A.{[h
// Implementation
$k?>DP4
protected: dscgj5b1~
HICON m_hIcon; P%6~&woF
// Generated message map functions [~^0gAlQC
//{{AFX_MSG(CCaptureDlg) ;I*o@x_
virtual BOOL OnInitDialog(); T|p"0b A
afx_msg void OnSysCommand(UINT nID, LPARAM lParam); .h[:xYm
afx_msg void OnPaint(); ZEQ Ex]Y
afx_msg HCURSOR OnQueryDragIcon(); s>en
virtual void OnCancel(); H. c7Nle
afx_msg void OnAbout(); /B3i C#?
afx_msg void OnBrowse(); G"6 !{4g
afx_msg void OnChange(); O}P`P'Y|'
//}}AFX_MSG *fdTpXa
DECLARE_MESSAGE_MAP() ~BF&rx5Q
}; Rv=YFo[B
#endif ;,TFr}p`
Th%zn2R B
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file <[phnU^
8
#include "stdafx.h" yuVs
YV@"
#include "Capture.h" (ZGbhMK
#include "CaptureDlg.h" U(Zq= M
#include <windowsx.h> 9z0p5)]n>
#pragma comment(lib,"hook.lib") Z.WW(C.
#ifdef _DEBUG >Q/Dk7 #
#define new DEBUG_NEW VQs5"K"
#undef THIS_FILE [e
q&C_|D
static char THIS_FILE[] = __FILE__; :U\tv[
#endif :Al!1BJQ
#define IDM_SHELL WM_USER+1 5bIw?%dk(
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); dI2
V>vk
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); (mOtU8e
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; =vPj%oLp'a
class CAboutDlg : public CDialog 5\v3;;A[
{ CAe!7HiR
public: &L:!VL{I
CAboutDlg(); GVz6-T~\>
// Dialog Data G)YcJv7
//{{AFX_DATA(CAboutDlg) *_e3 @g
enum { IDD = IDD_ABOUTBOX }; N;R^h? '
//}}AFX_DATA LLI.8kn7
// ClassWizard generated virtual function overrides [RL9>n8f
//{{AFX_VIRTUAL(CAboutDlg) >sF)BoLc
protected: cS$_\65
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support 7nSxi+6e
//}}AFX_VIRTUAL fOHxtHM
// Implementation 5N]"~w*
protected: pdMc}=K
//{{AFX_MSG(CAboutDlg) @d_M@\r=j
//}}AFX_MSG KXrjqqXs
DECLARE_MESSAGE_MAP() Z,=1buSz_
}; Y@v>FlqI{
YQ}o?Q$z
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) . me;.,$#
{ t7pFW^&
//{{AFX_DATA_INIT(CAboutDlg) TrNF=x>
//}}AFX_DATA_INIT 0"R|..l/
} ~~.}ah/_d
|:o4w
void CAboutDlg::DoDataExchange(CDataExchange* pDX) Pfh mo $
{ @ZJS&23E
CDialog::DoDataExchange(pDX); YR70BOxK
//{{AFX_DATA_MAP(CAboutDlg) Smh,zCc>s
//}}AFX_DATA_MAP Om<a<q
} rA1._
"7
yD0T)2
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) yu|>t4#GT
//{{AFX_MSG_MAP(CAboutDlg) >l m&iF3y
// No message handlers dQvcXl]
//}}AFX_MSG_MAP cl1T8vFM
END_MESSAGE_MAP() k+/6$pI
46x'I(
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) yauvXosX
: CDialog(CCaptureDlg::IDD, pParent) LD?sh"?b
{ @iiT<
//{{AFX_DATA_INIT(CCaptureDlg) hoP]9&<T
m_bControl = FALSE; /
1RpM]d
m_bAlt = FALSE; #Y!a6h+
m_bShift = FALSE; VUc%4U{Cti
m_Path = _T("c:\\"); ("@!>|H
m_Number = _T("0 picture captured."); }\f0 A-
nCount=0; Mt$
*a
bRegistered=FALSE; B?QIN]
bTray=FALSE; s.rm7r@#
//}}AFX_DATA_INIT b>W%t
// Note that LoadIcon does not require a subsequent DestroyIcon in Win32 s"|Pdc4
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); V#HuIgf-
} im8 CmQ
/FII07V
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) :s,Z<^5a)g
{ n<,BmVQ
CDialog::DoDataExchange(pDX); ,uvRi)O>a
//{{AFX_DATA_MAP(CCaptureDlg) zA 3_Lx!
DDX_Control(pDX, IDC_KEY, m_Key); kM6
Qp
DDX_Check(pDX, IDC_CONTROL, m_bControl); NbobliC=
DDX_Check(pDX, IDC_ALT, m_bAlt); e.> P8C<&
DDX_Check(pDX, IDC_SHIFT, m_bShift); #E[0ys1O
DDX_Text(pDX, IDC_PATH, m_Path); 9?$i?
DDX_Text(pDX, IDC_NUMBER, m_Number); (Z*!#}z`
//}}AFX_DATA_MAP .`lCWeHN
} !i50QA|(G
gi8FHSU|G
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) ' QG?nu
//{{AFX_MSG_MAP(CCaptureDlg) R-:2HRaA
ON_WM_SYSCOMMAND() ?[AD=rUC
ON_WM_PAINT() c$,P ~Ws'
ON_WM_QUERYDRAGICON() Z;i:](
ON_BN_CLICKED(ID_ABOUT, OnAbout) Dv"9qk
ON_BN_CLICKED(IDC_BROWSE, OnBrowse) sK{e*[I>W
ON_BN_CLICKED(ID_CHANGE, OnChange) 9x8fhAy}4
//}}AFX_MSG_MAP 5R-6ji
END_MESSAGE_MAP() sB</DS
XSDpRo
BOOL CCaptureDlg::OnInitDialog() Y73C5.dNcE
{ :h$$J
lP
CDialog::OnInitDialog(); oRFq@g
ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); |>Vb9:q9Po
ASSERT(IDM_ABOUTBOX < 0xF000); ok[i<zl;'
CMenu* pSysMenu = GetSystemMenu(FALSE); 1x)J[fyId
if (pSysMenu != NULL) sx%[=g+<2(
{ D-c4EV
CString strAboutMenu; #R"*c
hLV
strAboutMenu.LoadString(IDS_ABOUTBOX); 9p/Bh$vJ
if (!strAboutMenu.IsEmpty()) rsQtMtS2
{ -"`=1l
pSysMenu->AppendMenu(MF_SEPARATOR); 3mgD(,(^
pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); =&]L00u.
} H)?z
#x
} h\o.&6sd
SetIcon(m_hIcon, TRUE); // Set big icon j^'go&p
SetIcon(m_hIcon, FALSE); // Set small icon 8Wx=p#_
m_Key.SetCurSel(0); %;_MGae
RegisterHotkey(); UpG~[u)%@
CMenu* pMenu=GetSystemMenu(FALSE); :]KAkhFkbb
pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); L#J1b!D&<6
pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); fl(wV.Je|
pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); \Z/@C lCm
return TRUE; // return TRUE unless you set the focus to a control uph(V
} *T/']t
Wc#24:OKe3
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) +2{Lh7Ks
{ wz%-%39q%
if ((nID & 0xFFF0) == IDM_ABOUTBOX) qna8|3eP
{ Nc`L;CP
CAboutDlg dlgAbout; L_T5nD^D
dlgAbout.DoModal(); "[J^YKoF
} DI>s-7
else 29KiuP
{ fex@,I&
CDialog::OnSysCommand(nID, lParam); f8~_E
} Tbq;h?D
} 3u=g6W2 F
>Ry01G]_/h
void CCaptureDlg::OnPaint() *pq\MiD/
{ !a`&O-ye
if (IsIconic()) a9gLg
&
{ CrLrw T
CPaintDC dc(this); // device context for painting ^sw?gH*
SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); ";F'~}bDA
// Center icon in client rectangle i@yC-))bY
int cxIcon = GetSystemMetrics(SM_CXICON); s_Sk0}e
int cyIcon = GetSystemMetrics(SM_CYICON); ;TYBx24vD'
CRect rect; K-4PI+qQ\
GetClientRect(&rect); _b 0&!l<
int x = (rect.Width() - cxIcon + 1) / 2; n S=W 1zf
int y = (rect.Height() - cyIcon + 1) / 2; HfVZ~PP
// Draw the icon 1#x0 q:6
dc.DrawIcon(x, y, m_hIcon); Da|z"I
x
} mt
.sucT
else }7Uoh(d
{ d0D]Q
CDialog::OnPaint(); ^!d3=}:0
} iTwm3V
P
} >6T8^Nt
)GpK@R]{
HCURSOR CCaptureDlg::OnQueryDragIcon() d=(mw_-?
{ LoV<:|GTI
return (HCURSOR) m_hIcon; jp,4h4C^)
} ]Um/FA W
jd:6:Fm
void CCaptureDlg::OnCancel() R&&4y 7
{ A^g(k5M*
if(bTray) dN q$}
DeleteIcon(); &~CI<\o P
CDialog::OnCancel();
];m_4
} LV Ge]lD
Xvu(vA
void CCaptureDlg::OnAbout() tw;}jh
{ 1Mzmg[L8
CAboutDlg dlg; 'L'R9&o<X
dlg.DoModal(); IxU/?Zm
} \e*]Ls#jS
0kh6@y3
void CCaptureDlg::OnBrowse() M%HU4pTW#o
{ I9Xuok!0>=
CString str; ye&;(30Oq
BROWSEINFO bi; 9*gZ-#
char name[MAX_PATH]; jA1+x:Wq
ZeroMemory(&bi,sizeof(BROWSEINFO)); 0J9x9j`&j
bi.hwndOwner=GetSafeHwnd(); P:c w|Q
bi.pszDisplayName=name; M3\AY30L
bi.lpszTitle="Select folder"; 54T`OE
=
bi.ulFlags=BIF_RETURNONLYFSDIRS; /m1\ iM\
LPITEMIDLIST idl=SHBrowseForFolder(&bi); zX[U~.
if(idl==NULL) ';CNGv -
return; 0mE 0 j
SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); Ud?Q%)X
str.ReleaseBuffer(); ^qs $v06
m_Path=str; t Q)qCk07
if(str.GetAt(str.GetLength()-1)!='\\') _6Sp QW
m_Path+="\\"; (`^1Y3&2
UpdateData(FALSE); 04ui`-c(
} X?O[r3<
@d'j zs
void CCaptureDlg::SaveBmp() H_a[)DT
{ zhQJy?>'m
CDC dc; I7onX,U+
dc.CreateDC("DISPLAY",NULL,NULL,NULL); B,@i
CBitmap bm; (PLUFT
int Width=GetSystemMetrics(SM_CXSCREEN); j2k"cmsKh
int Height=GetSystemMetrics(SM_CYSCREEN); wk^B"+Uhy
bm.CreateCompatibleBitmap(&dc,Width,Height); IGl9g_18
CDC tdc; M`_0C38
tdc.CreateCompatibleDC(&dc); J.a]K[ci
CBitmap*pOld=tdc.SelectObject(&bm); BmT! aue
tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); i!Ba]n
tdc.SelectObject(pOld); Gc?a +T
BITMAP btm; _BufO7`.
bm.GetBitmap(&btm); YK_7ip.a[
DWORD size=btm.bmWidthBytes*btm.bmHeight; 5BIY<B+i
LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); U^PgG|0N
BITMAPINFOHEADER bih; dtDFoETz
bih.biBitCount=btm.bmBitsPixel; /ZX}Nc g
bih.biClrImportant=0; 6ujWNf
bih.biClrUsed=0; m67V_s,7B
bih.biCompression=0; 4W75T2q#
bih.biHeight=btm.bmHeight; pglVR </
bih.biPlanes=1; 0GwR~Z}Z
bih.biSize=sizeof(BITMAPINFOHEADER); 5xiEPh
bih.biSizeImage=size; ).O)p9
bih.biWidth=btm.bmWidth; KNl$3nX
bih.biXPelsPerMeter=0; 0GL M(JmK
bih.biYPelsPerMeter=0; ~%oR[B7=|
GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); 0-gAyiKx?
static int filecount=0; @7}W=HB
CString name; >P(.:_^p
name.Format("pict%04d.bmp",filecount++); kh<2BOV
name=m_Path+name; ?,/ }`3Vw
BITMAPFILEHEADER bfh;
(3e2c
bfh.bfReserved1=bfh.bfReserved2=0; kJU2C=m@e2
bfh.bfType=((WORD)('M'<< 8)|'B'); " bG2:
bfh.bfSize=54+size; u8^lB7!e/
bfh.bfOffBits=54; `[A];]
CFile bf; V`5O{Gg
if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ +@UV?"d
bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); t20K!}D_
bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); TeQV?ZQ#}
bf.WriteHuge(lpData,size); rv;3~'V
bf.Close(); :RYTL'hes
nCount++; ceA9){
} }V>T M{
GlobalFreePtr(lpData); XW/o<[91
if(nCount==1) crCJrN=
m_Number.Format("%d picture captured.",nCount); \8tsDG(1 '
else #yen8SskB
m_Number.Format("%d pictures captured.",nCount); l;U?Z'n
UpdateData(FALSE); tPvpJX6kP
} "@kaHIf[
f$( e\++
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) ]:;&1h3'7
{ hTkyz
la
if(pMsg -> message == WM_KEYDOWN) jPeYmv]
{ <@}9Bid!o
if(pMsg -> wParam == VK_ESCAPE) al0L&z\
return TRUE; jIyQ]:* p
if(pMsg -> wParam == VK_RETURN) Kw}'W
8` c
return TRUE; nN;u,}e
} zs;JJk^
return CDialog::PreTranslateMessage(pMsg); a*;b^Ze`v
} (H]AR8%W
yZ:qU({KhD
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) iso4]>LF
{ @HW*09TG
if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ ESs\O?nO
SaveBmp(); :Tc^y%b0
return FALSE; iLT}oKF2N;
} 9mgIUjz
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ ^Cmyx3O^
CMenu pop; 9Flb|G%
pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); H]s.=.Ki
CMenu*pMenu=pop.GetSubMenu(0); 6@o*xK7L
pMenu->SetDefaultItem(ID_EXITICON); POW>~Tof1
CPoint pt; QJNFA}*>
GetCursorPos(&pt); mOSv9w#,
int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); 4Hg9N}
if(id==ID_EXITICON) kza5ab
DeleteIcon(); V]&\fk-{
else if(id==ID_EXIT) R]dg_Da
OnCancel(); d-m7}2c
return FALSE; l:%GH
} 0YzpZW"+
LRESULT res= CDialog::WindowProc(message, wParam, lParam); V)^+?B)T
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) +p^u^a
AddIcon(); v=k$A
return res; $M#>9QHhc
} b-y
;jPXs
void CCaptureDlg::AddIcon() <VcQ{F
{ MDN--p08
NOTIFYICONDATA data; BVm0{*-[|
data.cbSize=sizeof(NOTIFYICONDATA); DlT{`
CString tip; 2:R+tn(F
tip.LoadString(IDS_ICONTIP); *I'yH8Fcn
data.hIcon=GetIcon(0); hph4 `{T
data.hWnd=GetSafeHwnd(); h![#;>(
strcpy(data.szTip,tip); Jwp7gYZ
data.uCallbackMessage=IDM_SHELL; M2|is ~
data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; zX~MC?,W1
data.uID=98; l,:F
Shell_NotifyIcon(NIM_ADD,&data); Q&&@v4L
ShowWindow(SW_HIDE); JRFtsio*
bTray=TRUE; )+M0Y_r
} hSMH,^Io$
z2c6T.1M
void CCaptureDlg::DeleteIcon() z~Q)/d,Ac
{ *A< 5*Db:F
NOTIFYICONDATA data; ckn~#UE=
data.cbSize=sizeof(NOTIFYICONDATA); iLz@5Zj8
data.hWnd=GetSafeHwnd(); 23?rEhKe
data.uID=98; eQ"E
Shell_NotifyIcon(NIM_DELETE,&data); h~26WLf.
ShowWindow(SW_SHOW); N7_"H>O$0U
SetForegroundWindow(); S$3JMFA
ShowWindow(SW_SHOWNORMAL); :KN-F86i
bTray=FALSE; 6RM/GM
} C?Ucu]cW
X.V~SeS
void CCaptureDlg::OnChange() __@BUK{ q
{ YP9^Bp{0
RegisterHotkey(); 9cgUT@a
} zJXplvaL;
z=FZiH
BOOL CCaptureDlg::RegisterHotkey() .-=vx r
{ Tr|JYLwF
UpdateData(); *kVV+H<X|b
UCHAR mask=0; b\ PgVBf9
UCHAR key=0; +3`alHUK
if(m_bControl) [V!tVDs&'o
mask|=4; dd["dBIZ '
if(m_bAlt) 2Hdu:"j
mask|=2; ]d`VT)~vje
if(m_bShift) *dF>_F
mask|=1; OH"XrCX7n
key=Key_Table[m_Key.GetCurSel()]; |' .
if(bRegistered){ &?vgP!d&M
DeleteHotkey(GetSafeHwnd(),cKey,cMask); i&k7-<
bRegistered=FALSE; vj*%Q(E6Pt
} L(o15
cMask=mask; e*!kZAf
cKey=key; qVPeB,kIz
bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); !wp3!bLp
return bRegistered; bi:8(Q$w:`
} +)?J#g
fQ98(+6
四、小结 Th[dW<