protected virtual Image GetBitmapFromHandle(IntPtr handle)
{
Image ret;
Win32ApiWrapper.Rect winRect = new Win32ApiWrapper.Rect();
Win32ApiWrapper.GetWindowRect(handle, ref winRect);
IntPtr hdcSrc = Win32ApiWrapper.GetWindowDC(handle);
IntPtr hdcDest = Win32ApiWrapper.CreateCompatibleDC(hdcSrc);
IntPtr hBitmap = Win32ApiWrapper.CreateCompatibleBitmap(hdcSrc, winRect.GetWidth(), winRect.GetHeight());
IntPtr hOld = Win32ApiWrapper.SelectObject(hdcDest, hBitmap);
Win32ApiWrapper.BitBlt(hdcDest, 0, 0, winRect.GetWidth(), winRect.GetHeight(), hdcSrc, 0, 0, Win32ApiWrapper.RasterOptions.SRC_COPY);
Win32ApiWrapper.SelectObject(hdcDest, hOld);
Win32ApiWrapper.DeleteDC(hdcDest);
Win32ApiWrapper.ReleaseDC(handle, hdcSrc);
ret = Image.FromHbitmap(hBitmap);
Win32ApiWrapper.DeleteObject(hBitmap);
return(ret);
}
private void Deregister()
{
IntPtr ret = Interlocked.Exchange(ref this.hook, IntPtr.Zero);
if (ret != IntPtr.Zero)
{
Win32ApiWrapper.UnhookWindowsHookEx(ret);
}
}
private void Register()
{
Deregister();
using (Process p = Process.GetCurrentProcess())
using (ProcessModule curMod = p.MainModule)
{
this.hook = Win32ApiWrapper.SetWindowsHookEx(Win32ApiWrapper.HookType.WH_KEYBOARD_LL,
this.callback,
Win32ApiWrapper.GetModuleHandle(curMod.ModuleName),
0); // Thread.CurrentThread.ManagedThreadId);
}
System.Windows.Forms.Application.Run();
}
private IntPtr LowLevelKeyboardHook(int nCode, IntPtr wParam, IntPtr lParam)
{
WindowsMessage msg = (WindowsMessage)wParam;
bool cntrlPressed = (Win32ApiWrapper.GetAsyncKeyState((int)VirtualKeyCode.VK_CONTROL) & 0x8000) != 0;
if (nCode >= 0 && msg == WindowsMessage.WM_KEYUP)
{
KBDLLHook d = (KBDLLHook)Marshal.PtrToStructure(lParam, typeof(KBDLLHook));
if (d.vkCode == (int)VirtualKeyCode.VK_INSERT && cntrlPressed)
{
ThreadMsgQueue <Image> .Enqueue(generator.GetFocusedWindowImage());
}
}
return(Win32ApiWrapper.CallNextHookEx(IntPtr.Zero, nCode, wParam, lParam));
}
public Image GetFocusedWindowImage()
{
return(GetBitmapFromHandle(Win32ApiWrapper.GetForegroundWindow()));
}
public Image GetScreenImage()
{
return(GetBitmapFromHandle(Win32ApiWrapper.GetDesktopWindow()));
}