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Here is the Documentation on the function being called with DLLCall. Also - at the bottom, I include my code.
------------------------------------------- Description The Et5Init function is used to initialize Compression Plus. It returns a handle that must be passed to most of the other routines. When your program is done with Compression Plus, it must call Et5ShutDown to shut things down properly. If this function fails, the handle is not valid, and you can't use Compression Plus. Failure probably indicates an extreme lack of available memory. C Syntax short Et5Init ( LPCP5INFO * lpCP, long Reserved ); Delphi32 Syntax Function Et5Init ( Var lpCP: LongInt; Reserved: LongInt ): SmallInt; VB Syntax Function Et5Init ( lpCP As Long, ByVal Reserved As Long ) As IntegerParameters:
lpCP On return, contains the Compression Plus handle. Reserved Reserved for future use. For now, must be set to zero. (Result) A status code. Zero is returned on success. A nonzero value is returned if there is an error. --------------------------------------------Here is what I did...
dllhandle=DllLoad("CP5DLL32.DLL") message("Did I get it?",dllhandle) a1=DLLCall(dllhandle,lpstr:"Et5Init",lpstr:"lpCP", long:0) DllFree(dllhandle)
short Et5Init ( LPCP5INFO * lpCP, long Reserved );Hmmm... A function Et5Init that returns a 16 bit WORD. It needs a pointer to a pointer where it can store a handle for the current transaction. And a reserved parameter.
PTRBB=BinaryAlloc(4) BinaryEODSet(PTRBB,4) dllhandle=DllLoad("CP5DLL32.DLL") a1=DLLCall(dllhandle,WORD:"Et5Init",lpbinary:PTRBB, long:0) lpcp5info=BinaryPeek4(PTRBB,0) BinaryFree(PTRBB) ;;****Hereafter use long:lpcp5info in the rest of the Et5 functions than want it. ;;****Usually the first parameter of the mess. DllFree(dllhandle)I've seen this DLL before. It seems to work.
Article ID: W12865
Filename: DllCall to CP5DLL32 DLL.txt
File Created: 1999:04:15:16:50:10
Last Updated: 1999:04:15:16:50:10