How to Ignore WM_MOUSEACTIVATE Message for an MDI WindowLast reviewed: November 2, 1995Article ID: Q62068 |
The information in this article applies to:
In order to make an MDI window to become active and have the caret be in the same position as when the window was last active you need to process the WM_MOUSEACTIVATE message and return MA_ACTIVATEANDEAT for the first time. Therefore, you need to set a Boolean flag in the WM_MDIACTIVATE message so that the return is set only once. The sample code below can be used to modify the MULTIPAD sample application. Also, the following is documentation on MA_ACTIVATE* messages, taken from the Windows 3.0 final SDK README.WRI file:
WM_MOUSEACTIVATE Return Value The return value specifies whether the window should be activated and whether the mouse event should be discarded. It must be one of the following values: Value Meaning ----- ------- MA_ACTIVATE Activate the window. MA_NOACTIVATE Do not activate the window. MA_ACTIVATEANDEAT Activate the window and discard the mouse event. SAMPLE CODE
/* --- multipad.c MPMDIWndProc section --- */ case WM_MOUSEACTIVATE: // added if (bEatMessage) { bEatMessage = FALSE; return (LONG)MA_ACTIVATEANDEAT ; } /* else break */ break; case WM_MDIACTIVATE: /* If we're activating this child, remember it */ if (wParam){ hwndActive = hwnd; hwndActiveEdit = (HWND)GetWindowWord (hwnd, GWW_HWNDEDIT); bEatMessage = TRUE; // added } else{ hwndActive = NULL; hwndActiveEdit = NULL; } break; |
Additional reference words: 3.00 3.10 3.50 3.51 4.00 95
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