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cpthk0
Participant
July 11, 2009
Question

cfx custom tag using visual c++ 2008 express

  • July 11, 2009
  • 1 reply
  • 1360 views

Hi:

I have Visual C++ 2008 express edition to compile my custom cfx tag. Here are my steps:

1. new project -> Win32 -> Win32 Project, enter project name

2. Application Type: DLL, Finish

3. Project -> properties -> C/C++ -> General -> Additional Include Directories includes "C:\ColdFusion8\cfx\include"

4. #include "cfx.h"

4. Finish my code

My problem is my code surely has the "void ProcessTagRequest(CCFXRequest* pRequest)" function, but after I register my cfx, my cfm keeps giving me an error message: "Native CFX library does not have a ProcessTagRequest entry point."

I am guessing it's not a problem in my code, since I could compile my code no any error. I am guessing it's my visual c++ project setting problem, causing coldfusion unable to see my function. Any one has any clue?

Thanks.

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1 reply

C
cpthk0Author
Participant
July 11, 2009

I figured out the problem mysql.

I have to add "extern "C" __declspec( dllexport )" before my ProcessTagRequest function, but I also tried only "__declspec( dllexport )", which doesn't work.

Can anyone explain why I really need the extern "C" to work? The visual c++ documentation states that compiler does not require "extern "C" " to export function. Why do I need that for coldfusion?

Thanks.

S
SilentWings
Participant
April 5, 2014

many years later...

the "extern "C" " ensures, your entry points name is really "ProcessTagRequest", because some compiler add letters or other characters to it.

PS: You can use dumpbin.exe /EXPORTS your.dll to check the names.

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