運(yùn)行結(jié)果如下圖：

原理：

第一步 禁止更新屏幕
第二步 用GetDCEx獲取屏幕HDC，把他放進(jìn)位圖
第三步 算出屏幕分辨率，把截圖的結(jié)果大小/10重新顯示
第四步 把獲取的圖形顯示并隨機(jī)分配位置

第五步 重新開始，進(jìn)行32767次循環(huán)！

#include <windows.h>#define NUM 32767LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,PSTR szCmdLine, int iCmdShow) {static int iKeep[NUM][4];HDC hdcScr, hdcMem;int cx, cy;HBITMAP hBitmap;HWND hwnd;int i, j, x1, y1, x2, y2;if (LockWindowUpdate(hwnd = GetDesktopWindow())){hdcScr = GetDCEx(hwnd, NULL, DCX_CACHE | DCX_LOCKWINDOWUPDATE);hdcMem = CreateCompatibleDC(hdcScr);cx = GetSystemMetrics(SM_CXSCREEN) / 10;cy = GetSystemMetrics(SM_CYSCREEN) / 10;hBitmap = CreateCompatibleBitmap(hdcScr, cx, cy);SelectObject(hdcMem, hBitmap);srand((int)GetCurrentTime());for (i = 0; i < 2; i++)for (j = 0; j < NUM; j++){LockWindowUpdate(hwnd = GetDesktopWindow());if (i == 0){iKeep[j][0] = x1 = cx * (rand() % 10);iKeep[j][1] = y1 = cy * (rand() % 10);iKeep[j][2] = x2 = cx * (rand() % 10);iKeep[j][3] = y2 = cy * (rand() % 10);}else{x1 = iKeep[NUM - 1 - j][0];y1 = iKeep[NUM - 1 - j][1];x2 = iKeep[NUM - 1 - j][2];y2 = iKeep[NUM - 1 - j][3];}BitBlt(hdcMem, 0, 0, cx, cy, hdcScr, x1, y1, SRCCOPY);BitBlt(hdcScr, x1, y1, cx, cy, hdcScr, x2, y2, SRCCOPY);BitBlt(hdcScr, x2, y2, cx, cy, hdcMem, 0, 0, SRCCOPY);}DeleteDC(hdcMem);ReleaseDC(hwnd, hdcScr);DeleteObject(hBitmap);}return 0; }

總結(jié)

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