Does Multiple USES Cause Problems

[peralta_mike]

Will repeated USES for the same module cause problems? :confused:

I am using the #include to include file(s) which contains USES for various modules.
If my main script (which has the #include statement) repeats the USES for the same module(s) will this cause me any problems?

[Petr Schreiber]

Hi,

the behavior of Uses is documented in help file. If you load the same module second time, ThinBASIC knows it and does not reinitialize it, it only gives different return value to programmer to know about "redundant uses".



'

Long firstTime, secondTime

firstTime = Uses "UI"
secondTime= Uses "UI"

MsgBox 0, "FirstTime:"+$TAB(2)+DecodeError_Uses(firstTime) & $CRLF & "SecondTime:"+$TAB+DecodeError_Uses(secondTime)

Function DecodeError_Uses( nErr As Long ) As String

Select Case nErr
Case >= 0
Return "No Error"

Case -1
Return "Library not found"

Case -2
Return "Library is not ThinBASIC module"

Case -3
Return "Library already loaded"

End Select

End Function


Petr

[ErosOlmi]

Thanks Petr for your support.

Mike, please have look at USES help or check into online help at http://www.thinbasic.com/public/products/thinBasic/help/html/uses.htm

If module is already loaded, script execution will contine and USES will return error code -3. This is more a warning than an error code.

Ciao
Eros

[peralta_mike]

Thanks Petr and Eros. :rolleyes:

Thanks for the info about it being more of a warning.

I had already looked at the help info.

I just didn't know if calling USES for the same module would harm anything
(other than the return value).