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Tip of the Day
Language: Visual Basic
Expertise: Intermediate
Aug 6, 1997

WEBINAR:

On-Demand

Building the Right Environment to Support AI, Machine Learning and Deep Learning


Conditionally Compile Your Code

Most developers know about VB4's Conditional Compilation feature, where you can declare Windows APIs for 16-bit and 32-bit operating systems:
 
#If Win#32 then
        'If running in 32-bit OS  
        Declare SomeApi....
#Else
        'If running in 16-bit OS
        Declare SomeApi
#End IF 
This same feature applies not only to Windows API statements, but also to your own functions:
 
#If Win32 Then
        Dim lRc&
        lRc& = ReturnSomeNumber(35000)
#Else
        Dim lRc%
        lRc% = ReturnSomeNumber(30000)
#End If

#If Win32 Then
        Private Function ReturnSomeNumber_
                (lVar&) As Long
                ReturnSomeNumber = 399999
#Else
        Private Function ReturnSomeNumber_
                (lVar%) As Integer
                ReturnSomeNumber = 30000
#End If

End Function
Carl Denton
 
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