General information
Category:
Windows API functions
Title:
Detecting registered functions
I found a small program & .dll called "Addzip" that works very nicely from within VFP, but I have a problem.
The first time the .dll is called, it declare various functions in the dll (via a logical parameter passed). Subsequent calls to the dll are NOT supposed to do the declares again (and generate an error).
code snippet:
IF Params = 0 OR lInitialize
PRIVATE HWND
DECLARE INTEGER GetActiveWindow IN win32api
HWND = GetActiveWindow()
DECLARE addZIP_Initialise IN AZIP32
DECLARE SHORT addZIP_SetParentWindowHandle IN AZIP32 SHORT @ HWindow
DECLARE SHORT addZIP_ArchiveName IN AZIP32 STRING @ sArchName.....
How can you tell within VFP whether or not these declares have been done ?
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