Hi feng:
I know because I add the follow code after my 'do form xxx' clause. The code is :
Declare Integer GetActiveWindow In USER32.Dll
Declare SHORT SetActiveWindow In USER32.Dll Integer HWnd
LOCAL lnActiveWindow
lnActiveWindow=GetActiveWindow()
SetActiveWindow(lnActiveWindow)
and I add the code to init event of my form,and the problem seem solved,the code is:
thisform.combo1.selectedbackcolor=rgb(255,255,255)
Did my method is right?