/// <summary>
/// 可以截取非前端窗体的截图,但是非GDI的程序是无法截图的比如DirectX
/// </summary>
/// <param name="hWnd"></param>
/// <returns></returns>
public static Bitmap GetWindowCapture(IntPtr hWnd)
{
IntPtr hscrdc = WinApi.GetWindowDC(hWnd);
var windowRect = new WinApi.RECT();
WinApi.GetWindowRect(hWnd, ref windowRect);
int width = windowRect.right - windowRect.left;
int height = windowRect.bottom - windowRect.top;
IntPtr hbitmap = WinApi.CreateCompatibleBitmap(hscrdc, width, height);
IntPtr hmemdc = WinApi.CreateCompatibleDC(hscrdc);
WinApi.SelectObject(hmemdc, hbitmap);
WinApi.PrintWindow(hWnd, hmemdc, 0);
Bitmap bmp = Bitmap.FromHbitmap(hbitmap);
WinApi.DeleteDC(hscrdc);//删除用过的对象
WinApi.DeleteDC(hmemdc);//删除用过的对象
return bmp;
}
/// <summary>
/// 指定窗口截图 可以截取GDI或者非GDI图形 只不过,非前端窗体图形不能截获...
/// </summary>
/// <param name="handle">窗口句柄. (在windows应用程序中, 从Handle属性获得)</param>
/// <returns></returns>
public Bitmap CaptureWindow(IntPtr handle)
{
IntPtr hdcSrc = WinApi.GetWindowDC(handle);
WinApi.RECT windowRect = new WinApi.RECT();
WinApi.GetWindowRect(handle, ref windowRect);
int width = windowRect.right - windowRect.left;
int height = windowRect.bottom - windowRect.top;
IntPtr hdcDest = WinApi.CreateCompatibleDC(hdcSrc);
IntPtr hBitmap = WinApi.CreateCompatibleBitmap(hdcSrc, width, height);
IntPtr hOld = WinApi.SelectObject(hdcDest, hBitmap);
WinApi.BitBlt(hdcDest, 0, 0, width, height, hdcSrc, 0, 0, WinApi.SRCCOPY);
//WinApi.SelectObject(hdcDest, hOld);
WinApi.DeleteDC(hdcDest);
WinApi.ReleaseDC(handle, hdcSrc);
var img = Bitmap.FromHbitmap(hBitmap);
WinApi.DeleteObject(hBitmap);
return img;
}