Sets the FileExtension member of the BlackIceDEVMODE. Sets the value of the 'File Name Extension' edit box.
SetFileExtension(fnameext As String, pBlackIceDEVMODE As Long) As Boolean
Input value: fnameext - File Name Extension
Input value: pBlackIceDEVMODE - handle to the BlackIceDEVMODE.
Return value - TRUE if the member was successfully set, otherwise FALSE.
NOTE: For 32-bit applications , use pBlackIceDEVMODE as Integer, instead of Long.