CBaseControlWindow::PossiblyEatMessage (Windows CE 5.0)
Forwards keyboard and mouse messages to a specified window.
BOOL WINAPI PossiblyEatMessage(HWNDhwndDrain,UINTuMsg,WPARAMwParam,LPARAMlParam);
Parameters
- hwndDrain
Handle of the window to which messages will be forwarded. - uMsg
Message that was forwarded. - wParam
First message parameter. - lParam
Second message parameter.
Return Values
Returns TRUE if the message was posted or FALSE if it was not.
Remarks
When the window is owned, it will pass certain classes of messages to the owning window (such as keyboard and mouse events). In this case, the Win32 PostMessage function is used to post messages to any window specified by hwndDrain which is set in CBaseControlWindow::put_MessageDrain.
If a certain message cannot be posted, this message will return FALSE.
The following is a list of messages that will get passed on untranslated and return TRUE:
| WM_CHAR | WM_DEADCHAR |
| WM_KEYDOWN | WM_KEYUP |
| WM_LBUTTONDBLCLK | WM_LBUTTONDOWN |
| WM_LBUTTONUP | WM_MBUTTONDBLCLK |
| WM_MBUTTONDOWN | WM_MBUTTONUP |
| WM_MOUSEACTIVATE | WM_MOUSEMOVE |
| WM_RBUTTONDBLCLK | WM_RBUTTONDOWN |
| WM_RBUTTONUP | WM_SYSCHAR |
| WM_SYSDEADCHAR | WM_SYSKEYDOWN |
| WM_SYSKEYUP |
Requirements
DirectShow applications and DirectShow filters have different include file and link library requirements.
For more information, see Setting Up the Build Environment.
OS Versions: Windows CE 3.0 and later.
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