>Hi Bruce,
>
> My code is as below,
>
> Procedure DisplayHelp
> *------------------------*
> Public opHelpObj
> opHelpObj = CreateObject("MyHelp")
> opHelpObj.PfFldHelp(ppHelpGrid)
> opHelpObj.Show(1)
> If ISNULL(opHelpObj)
> Release opHelpObj
> Return .f.
> EndIf
> Return .t.
>
> This code is in Prg And MyHelp is class containing one grid on form. This is my help class which i use to display help on any field.
>
>This displays the help but after command opHelpObj.Show(1) Menu changes to sys menu. if u didnt find any solution, tomorrow i will mail you some code.

I created a simple test project with custom menu and modal form lauched from modeless form, and it works fine with the normal default MPR sysmenu settings in vfp6. Your problem must run a little deeper...try doing what I've done, launch your modal from a very simple test situation...