I received a report recently that my 2003 CDECL submission had generated DEP errors on Server 2003. I've updated that submission, but whilst doing so, I saw the potential for some improvements. Enhancements that really needed a new submission. Features: Transparent CDECL/stdcall function calling. Call functions by ordinal or name. Module (.bas) callbacks for CDECL functions. Object (.cls/.frm/.ctl) callbacks for CDECL and stdcall functions. Support for multiple callbacks. Support for multiple cCallFunc.cls instances. Support unicode path\module names. NEW SUBMISSION: 70195
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The rewrite makes this class even easier to use and more capable. You really CAN call cdecl routines from VB! Paul saved me a ton of work with this one! (If this comment was disrespectful, please report it.)
Thx, but it don't work for me. I'm sure that my DLL exists, that it exports required functions correctly, but your code fails. (If this comment was disrespectful, please report it.)
mnn, what doesn't work for you? Does CallFunc raise a VB error? Is the function name mangled? If so, have you tried by ordinal? Is the dll in the path? Is the dll fastcall? I don't currently support that convention as it's rare and not standardised between different vendors implementations e.g. Microsoft/GCC, Borland/Delphi, Watcom, TopSpeed/Clarion/JPI (If this comment was disrespectful, please report it.)
Your submissions along with LaVolpe's submissions are single-handedly extending the life of VB6. Keep up the excellent work. (If this comment was disrespectful, please report it.)
Great work! A small suggestion though. How about adding the ability to call function pointers not just from a dll? I tried a quick hack by adding another function similiar to the dll function, but it seems to break the code. If I modify the existing one it seems to be working. But i need to investigate it a bit further. It was just a quick hack. Anyway, 5 globes :) (If this comment was disrespectful, please report it.)
thx people... @zaz: interesting thought, I'll look into that for you for the next update (soon-ish) which will add support for MS/GCC __fastcall function calling. (If this comment was disrespectful, please report it.)
Hey there Pauly! Long time no see, I'll get straight to the point. I was working on a bot for a battle.net game client. Part of the bot required loading a dll and calling a fastcall function. Although the code is specifically made for one purpose only, it could be easily ported to an universal fastcall function caller.
code location: http://forum.valhallalegends.com/index.php?topic=7248.15 (If this comment was disrespectful, please report it.)
Does the job nicely. However, what to do about functions returning a double - or did I miss something. (If this comment was disrespectful, please report it.)
As a follow up to the question on functions returning a double. I've added some sample code. The return value seems to be neither a double nor a valid pointer. Any suggestions, anyone - especially since callbacks, char* all work fine.
Private Declare Function GetDouble Lib "MyDLL" () As Double Public Sub MyTest() Dim ccf As New cCallFunc Dim d As Double Dim l As Long d = GetDouble() Debug.Print "d ="; d d = ccf.CallFunc("MyDLL", "GetDouble") l = ccf.CallFunc("MyDLL", "GetDouble") Debug.Print "d ="; d; ", l = "; l End Sub
>>d = 1.1 >>d =-858993460 , l = -858993460
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I will make a new submission soon that adds support for __fastcall, call by pointer and a complete set of return types... namely: Byte, Integer, Long, Int64 (Currency), Single, Double and no return value (ala a VB sub or "void" in 'C'). Demonstrates also how to pass ByVal parameters that are larger than Long.. eg. Double and Currency. Soon. (If this comment was disrespectful, please report it.)
Can any one help me? I was trying to call a function by using a string variable / joining 2 string to form a function name, is this possible in VB? I can do this in Clipper and I find this useful. (If this comment was disrespectful, please report it.)
i was looking to use windowsAccessBridge.dll in VBA...when I came across you class, i believe i found the way out ! I did try to call functions of that dll, however One of the function which returns vmID and Accessbility content, call that with help of this class crashes the VBA editor !!
Can you please point out if i am doing anything wrong...or that is the limitation of use of class in VBA ? (If this comment was disrespectful, please report it.)
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12/7/2007 10:35:33 AM: 
