The ShowHideMenuCtl function sets or removes the specified menu item's check-mark attribute, and shows or hides the corresponding control. The function adds a check mark to the specified menu item if it does not have one and then displays the corresponding control. If the menu item already has a check mark, the function removes the check mark and hides the corresponding control.
BOOL ShowHideMenuCtl(
| HWND hWnd, | // handle to MDI child window |
| UINT uFlags, | // message |
| LPINT lpInfo | // first message parameter |
| ); |
Parameters
hWnd
Handle to the window that contains the menu and controls.
uFlags
Identifier of the menu item to receive or lose a check mark.
lpInfo
Pointer to an array that contains pairs of values. The second value in the first pair must be the handle to the application's main menu. Each subsequent pair consists of a menu item identifier and a control window identifier. The function searches the array for a value that matches uFlags and, if the value is found, checks or unchecks the menu item and shows or hides the corresponding control.
Return Values
If the function shows or hides the control, the return value is nonzero.
If the function does not show or hide the control, the return value is zero.