前几天寝室里几个哥们玩QQ，找茬，我们六人还找不过一人，甚是郁闷，于是我决定编写一个找茬程序。
效果图如下。配置菜单里是相关参数的设置，点击截图菜单项后窗口自动移动，并显示出两幅图的不同。技术含量不是很高。
我传了一个效果图，1.jpg,那个紫色圆形是随着鼠标动而动产生的，方便定位。
注释确实太少了。
我说一下思路吧，先把窗口移到右边，截取桌面左边图像，再移到左边，截取右边图像，并进行异或操作，这样不同的地方就显示出来了。
我本想给游戏窗口发鼠标消息的，可一想，这个图片较小，不同之处也少，干脆又人来定位得了。如果要自动定位的话，我想用内存设备描述表中位图句柄来得到图像像素数据，不知道有更好的方法没。还请高人指教！
上传附件不太方便，贴代码吧
#include <windows.h>
#include "resource.h"
#define ID_TIMER 1
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
POINT left,right;
int height,width;
int cxSize,cySize;
HDC hdcMem;/////////////////////////内存DC
HBITMAP hBitmap;
POINT pt;
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT ("SCR_COPY") ;
HWND hwnd ;
MSG msg ;
WNDCLASS wndclass ;
wndclass.style = CS_HREDRAW | CS_VREDRAW ;
wndclass.lpfnWndProc = WndProc ;
wndclass.cbClsExtra = 0 ;
wndclass.cbWndExtra = 0 ;
wndclass.hInstance = hInstance ;
wndclass.hIcon = LoadIcon (hInstance,szAppName) ;
wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
wndclass.lpszMenuName = szAppName ;
wndclass.lpszClassName = szAppName ;
if (!RegisterClass (&wndclass))
{
MessageBox (NULL, TEXT ("This program requires Windows NT!"),
szAppName, MB_ICONERROR) ;
return 0 ;
}
hwnd = CreateWindow (szAppName, // window class name
TEXT ("SCR_COPY"), // window caption
WS_OVERLAPPEDWINDOW, // window style
CW_USEDEFAULT, // initial x position
CW_USEDEFAULT, // initial y position
CW_USEDEFAULT, // initial x size
CW_USEDEFAULT, // initial y size
NULL, // parent window handle
NULL, // window menu handle
hInstance, // program instance handle
NULL) ; // creation parameters
ShowWindow (hwnd, iCmdShow) ;
UpdateWindow (hwnd) ;
while (GetMessage (&msg, NULL, 0, 0))
{
TranslateMessage (&msg) ;
DispatchMessage (&msg) ;
}
return msg.wParam ;
}
///////////////////////////////////////////////////////////////////
void CALLBACK TimerProc(HWND hwnd,UINT message,UINT iTimerID,DWORD dwTime)
{
HDC hdc_me = GetDC(hwnd);
POINT pos,pos2;
HBRUSH hBrush;
BitBlt(hdc_me,0,pt.y,width,height,
hdcMem,0,0,SRCCOPY);
hBrush = CreateSolidBrush(RGB(255,100,255));
SelectObject(hdc_me,hBrush);
GetCursorPos(&pos);
pos2 = pos;
ScreenToClient(hwnd,&pos2);
Ellipse(hdc_me,pos.x-cxSize/2-5,pos2.y-5,pos.x-cxSize/2+5,pos2.y+5);
DeleteObject(hBrush);
ReleaseDC(hwnd,hdc_me);
}
///////////////////////////////////////////////////////////////////
BOOL CALLBACK AboutDlgProc(HWND hDlg,UINT message,WPARAM wParam,LPARAM lParam)
{
switch(message)
{
case WM_INITDIALOG:
return TRUE;
case WM_COMMAND:
switch(LOWORD(wParam))
{
case IDOK:
EndDialog(hDlg,0);
return TRUE;
}
break;
}
return FALSE;
}
///////////////////////////////////////////////////////////////////
BOOL CALLBACK DlgProc(HWND hDlg,UINT message,
WPARAM wParam,LPARAM lParam)
{
switch(message)
{
case WM_INITDIALOG:
SetDlgItemInt(hDlg,IDC_L_X,left.x,0);
SetDlgItemInt(hDlg,IDC_L_Y,left.y,0);
SetDlgItemInt(hDlg,IDC_R_X,right.x,0);
SetDlgItemInt(hDlg,IDC_R_Y,right.y,0);
SetDlgItemInt(hDlg,IDC_HEIGHT,height,0);
SetDlgItemInt(hDlg,IDC_WIDTH, width,0);
return 0;
case WM_CLOSE:
EndDialog(hDlg,FALSE);
return 0;
case WM_COMMAND:
switch(LOWORD(wParam))
{
case IDOK:
left.x = GetDlgItemInt(hDlg,IDC_L_X,NULL,0);
left.y = GetDlgItemInt(hDlg,IDC_L_Y,NULL,0);
right.x = GetDlgItemInt(hDlg,IDC_R_X,NULL,0);
right.y = GetDlgItemInt(hDlg,IDC_R_Y,NULL,0);
height = GetDlgItemInt(hDlg,IDC_HEIGHT,NULL,0);
width = GetDlgItemInt(hDlg,IDC_WIDTH,NULL,0);
EndDialog(hDlg,TRUE);
return TRUE;
}
}
return 0;
}
TCHAR szString[] = TEXT ("Hello, 千里眼") ;
LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static HINSTANCE hInstance;
static count = 0;
static flag = 0;
HDC hdc_me,hdc;//依次为窗口设备描述表，桌面DC
PAINTSTRUCT ps ;
HWND desk_hwnd = GetDesktopWindow();
switch (message)
{
case WM_CREATE:
left.x = 8;
left.y = 192;
right.x = 517;
right.y = 192;
cxSize = GetSystemMetrics(SM_CXSCREEN);
cySize = GetSystemMetrics(SM_CYSCREEN);
width = cxSize/2;
height = cySize;
hInstance = ((LPCREATESTRUCT)lParam)->hInstance;
RegisterHotKey(hwnd,100,0,VK_F4);
SetWindowPos(hwnd,HWND_TOPMOST,
0,0,0,0,SWP_NOMOVE|SWP_NOSIZE);
return 0;
case WM_COMMAND:
switch(LOWORD(wParam))
{
case IDM_START:
if(DialogBox(hInstance,TEXT("SCR_COPY"),hwnd,DlgProc))
InvalidateRect(hwnd,NULL,TRUE);
return 0;
case IDM_CUT:
MoveWindow(hwnd,cxSize/2,0,width,height,TRUE);//窗口移到右边
Sleep(200);//稍等一下
hdc_me = GetDC(hwnd);
hdcMem = CreateCompatibleDC(hdc_me);//内存设备描述表
if(hBitmap)
{
DeleteObject(hBitmap);
hBitmap = NULL;
}
hBitmap = CreateCompatibleBitmap(hdc_me,width,height);
SelectObject(hdcMem,hBitmap);
hdc = GetDCEx(desk_hwnd,0,DCX_LOCKWINDOWUPDATE);
pt = left;
ScreenToClient(hwnd,&pt);
//BitBlt(hdc_me,0,pt.y,width,height,
// hdc,left.x,left.y,SRCCOPY);
BitBlt(hdcMem,0,0,width,height,
hdc,left.x,left.y,SRCCOPY);//桌面左边图像放入内存
MoveWindow(hwnd,0,0,width,height,TRUE);//窗口移到右边
Sleep(200);
//右边图像放入内存并进行异或操作
BitBlt(hdcMem,0,0,width,height,
hdc,right.x,right.y,SRCINVERT);
BitBlt(hdc_me,0,pt.y,width,height,
hdcMem,0,0,SRCCOPY);
// BitBlt(hdc_me,0,0,width,height,
// hdcMem,0,0,SRCCOPY); //程序编写时测试代码
if(flag)
KillTimer(hwnd,ID_TIMER);
flag = 1;
SetTimer(hwnd,ID_TIMER,50,TimerProc);
ReleaseDC(hwnd,hdc_me);
ReleaseDC(desk_hwnd,hdc);
return 0;
case IDM_ABOUT:
DialogBox(hInstance,TEXT("AboutBox"),hwnd,AboutDlgProc);
return 0;
}
break;
case WM_PAINT:
hdc = BeginPaint (hwnd, &ps) ;
TextOut(hdc,50,50,szString,lstrlen(szString));
EndPaint (hwnd, &ps) ;
return 0 ;
case WM_HOTKEY:
if(IsWindowVisible(hwnd))
ShowWindow(hwnd,SW_HIDE);
else
ShowWindow(hwnd,SW_SHOW);
SendMessage(hwnd,WM_COMMAND,IDM_CUT,0);
return 0;
case WM_DESTROY:
KillTimer(hwnd,ID_TIMER);
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}
代码简单，就不多说了。各位看官莫笑。
