Write a dynamic library for PowerBuilder using PowerBASIC

According to the normal DLL writing method in Pb, it is important to pay attention to the problem of two PB direct data type conversion.

PowerBASIC directly defines the string type parameter, corresponding to the PB blob type

The fixed-length string string*n or anscii*n, defined in PowerBASIC, corresponds to the PB string type, at which time the parameter pass type is passed as a byref reference.

Defined

FUNCTION myfun ALIAS "Myfun" (  BYVAL matchstring As String  ) EXPORT As String  

Statement

Public function String Replacenull (BLOB mainstring)  library "MyDLL.DLL" Alias for "Myfun"

　

Defined

FUNCTION MyFunction1     ALIAS "MyFunction1" (BYREF Param1 as  string *60) EXPORT As String MSGBOX "MYDLL. DLL has recevied: "+ (Param1)    function =" 1 "' Param1  ' return 1 to calling Programend function  

　

Statement

string string  ABC)  "mydll.dll"

　

Write a dynamic library for PowerBuilder using PowerBASIC