You receive a "C2660" error code when you call a Windows API from within a member function of a window class (87636)

The information in this article applies to:

The Microsoft Foundation Classes (MFC), when used with:
- Microsoft Visual C++, 32-bit Enterprise Edition
- Microsoft Visual C++, 32-bit Professional Edition
- Microsoft Visual C++, 32-bit Learning Edition
- Microsoft Visual C++ 2005 Express Edition
- Microsoft Visual C++ .NET (2003)
- Microsoft Visual C++ .NET (2002)

This article was previously published under Q87636

SYMPTOMS

When using the Microsoft Foundation Classes (MFC), the following error may occur when making a Windows application programming interface (API) call from within a member function of a window class:

   C2660: 'function' : function does not take 'number' parameters

CAUSE

Many of the Windows API calls are accessed in the Microsoft Foundation Classes through member functions of the same name as the API calls. This means that the name will be recognized, but because most member functions require fewer parameters than their API counterparts, the C2660 error occurs.

RESOLUTION

Either of the following two methods eliminates the error:

Adjust the function call to conform to the format of the member:
```
   function call.

   -or-
						
```
Use the scope resolution operator (::) to tell the compiler to look for the function name in the global name space.

Modification Type:	Major	Last Reviewed:	1/7/2006
Keywords:	kbprb KB87636 kbAudDeveloper