MM MATCHMNEMONIC

#define MM_MATCHMNEMONIC 0x01f0

Find match of mnemonic char in menu.

mp1

SHORT1FROMMP(mp1)

character to match

SHORT2FROMMP(mp1)

number of submenu levels to search
                          0 = none
                          1 = top-level (this menu)
                          2 = top+first submenu
                          3 = top+first 2 submenus
                          (etc.)
                         -1 = all

mp2

pointer to HWND of menu where match found

Returns both the index of the item in the menu that matched and the level of the match : MRFROM2SHORT (hwndmenu, index). In addition, mp2 is updated to contain the window handle of the menu that contained the mnemonic.

This message is sent withing the menu code when the WM_CHAR is being processes and the menu code is trying to find a mnemonic match for the character pressed. This message is not sent to the owner window, so you must subclass the menu window in order to receive this message.

(Source: newsgroup)