how to use sendkeys in turbo C executable file? here is my sample code

[gelliefer]

dim place as string

form_load()
place = shell("c:\tc150\tc.exe", vbminimizedFocus)
AppActivate (place)
sendkeys = "{F3}", true


end sub

' the F3 function doesnt work in turbo C, it happens in Visual basic not in turbo C. how can i control turbo C?