Check Menu Item

I've added an item to the control menu of a form.
How can I check this item?
I've tried CheckMenuItem but this needs the id of the Item I added but I don't know how to get It. I also tried tu use GetMenuItemId but this again needs some identification number.
Can someone hlp me out?
(I know I'm spamming a bit with these hardcore questions today :D )

Already found it out myself :)
first u get the control menuitem id:

itemID = GetMenuItemID(GetSystemMenu(frmMain.hwnd, 0&), 8)
'8 is the index of the item (counting starts from 0)

then u check it:
CheckMenuItem GetSystemMenu(frmMain.hwnd, 0&), itemID, MF_CHECKED

YESSSSS
:D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D

Sorry for all who were bothered by that ;)