WM_INITMENUPOPUP

2.x

WM_INITMENUPOPUP
hmenuPopup = (HMENU) wParam;         /* handle of pop-up menu */
nIndex = (int) LOWORD(lParam);       /* index of pop-up menu  */
fSystemMenu = (BOOL) HIWORD(lParam); /* System-menu flag      */

The WM_INITMENUPOPUP message is sent when a pop-up menu is about to become active. This allows an application to modify the pop-up menu before it is displayed, without changing the entire menu.

Parameters

hmenuPopup

Value of wParam. Identifies the pop-up menu.

nIndex

Value of the low-order word of lParam. Specifies the index of the pop-up menu in the main menu.

fSystemMenu

Value of the high-order word of lParam. Specifies a nonzero value if the pop-up menu is the System menu (sometimes referred to as the Control menu); otherwise, this parameter is zero.

Return Value

An application should return zero if it processes this message.

Example

This example initializes the items in a pop-up menu:

int  nCount;
WORD wItem;
UINT uID;

case WM_INITMENUPOPUP:
    nCount = GetMenuItemCount(wParam);
    for (wItem = 0; wItem < nCount; wItem++) {
        uID = GetMenuItemID(wParam, wItem);
        .
        . /* Initialize menu items. */
        .
    }
    break;