CALL DWORD

[Dave Kelly]

I am trying to call a function which needs no arguments but returns a long integer.

dim process as dword
'assign process to function address
dim result as long

call dword process to result 'I can't get this line to compile using PBDLL5.0

Any help appreciated.

Regards

Dave

[Peter Stephensen]

This works in PBDLL 6.0:

#COMPILE EXE
 
DECLARE FUNCTION ProcessProc() AS LONG
 
FUNCTION PBMAIN
 
    DIM Process AS DWORD
    DIM Result AS LONG
     
    Process = CODEPTR(ProcessProc)
 
    CALL DWORD Process USING ProcessProc() TO Result
 
    MSGBOX FORMAT$(Result)
    
END FUNCTION
 
FUNCTION ProcessProc() AS LONG
 
    FUNCTION = 1
    
END FUNCTION

[Lance Edmonds]

When using the TO keyword, you must also use the USING keyword. This requires a DECLARE statement to tell the compiler how to pass parameters (if any) to the target sub/function. Please review the CALL DWORD page in the help file. Peter's code shows this in action.

-------------
Lance
PowerBASIC Support
( mailto:[email protected][email protected]</A> )

[Dave Kelly]

Thanks

I did read the documentation (both pdf and hlp) and the following copied from the documentation seems to indicate that you don't have to use USING to use TO.

CALL DWORD pointer [BDECL|CDECL|SDECL] [TO variable]
CALL DWORD pointer [USING abc([ Argument_list])] [TO variable]

Cheers

Dave

[Dave Navarro]

That was a bug in the PB/DLL 5.0 documentation that was corrected in the PB/DLL 6.0 documentation. You may want to update to the latest version of the compiler.

--Dave


-------------
PowerBASIC Support
mailto:[email protected][email protected]</A>