我希望创建一个简单的项目(语言不是很重要/但我更喜欢C ++),它只需要将窗口标题作为输入,并将其视觉部分逐位复制到新窗口中。就像一个镜子一样,最好这么说。 据我所记,有一个win32 API可以实现这一点,但我记不清了,所以你能告诉我如何实现吗? 请告诉我,你的答案是否也适用于DirectX/Open-GL应用程序?
这里是一个程序的源代码,可以镜像其他应用程序,您可以使用StretchBlt()
代替BitBlt()
,这将不会复制菜单栏或弹出窗口。
一些应用程序,如Chrome、计算器和相机,使用子窗口进行可视化部分,而FindWindow()
仅扫描顶级窗口的标题,因此您可以使用FindWindowEx()
来使其工作!
#include <windows.h>
HWND sourceWindow;
void Mirror(HWND hwndSource, HWND hwndDst)
{
HDC source = GetDC(hwndSource);
HDC dst = GetDC(hwndDst);
RECT srcSiz;
GetClientRect(hwndSource, &srcSiz);
SetWindowPos(hwndDst, NULL, 0, 0, srcSiz.right, srcSiz.bottom, SWP_NOMOVE | SWP_NOZORDER);
BitBlt(dst, 0, 0, srcSiz.right, srcSiz.bottom, source, 0, 0, SRCCOPY);
ReleaseDC(hwndSource, source);
ReleaseDC(hwndDst, dst);
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam)
{
switch (Message)
{
case WM_CREATE:
SetTimer(hwnd, 1, 500, (TIMERPROC) NULL);//This will refresh after every 500 ms
break;
case WM_TIMER:
Mirror(sourceWindow, hwnd);
break;
case WM_DESTROY:
KillTimer(hwnd, 1);
break;
default:
return DefWindowProc(hwnd, Message, wParam, lParam);
}
return 0;
}
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
WNDCLASSEX wc;
HWND hwnd;
MSG msg;
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon(hInstance, IDI_APPLICATION);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(CreateSolidBrush(RGB(0, 0, 0)));
wc.lpszMenuName = NULL;
wc.lpszClassName = "MyWindow";
wc.hIconSm = LoadIcon(hInstance, IDI_APPLICATION);
if (!RegisterClassEx(&wc))
{
MessageBox(NULL, "Window Registration Failed!", "Error!", MB_ICONEXCLAMATION | MB_OK);
return 0;
}
hwnd = CreateWindowEx(WS_EX_OVERLAPPEDWINDOW, "MyWindow", "MyTitle", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 500, 500,
NULL, NULL, hInstance, NULL);
if (!hwnd)
{
MessageBox(NULL, "Window Creation Failed!", "Error!", MB_ICONEXCLAMATION | MB_OK);
return 0;
}
ShowWindow(hwnd, nCmdShow);
UpdateWindow(hwnd);
sourceWindow = FindWindowA(NULL, "<WindowTitle>");//or you can use class name
while(GetMessage(&msg, NULL, 0, 0) > 0)
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}