PRB: C2146 Error with Sqloledb.h in Platform SDK

This article was previously published under Q255556
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When you compile an application that uses the Sqloledb.h header file from the Microsoft Platform Software Development Kit (SDK), you receive the following error:
error C2146: syntax error : missing ';' before identifier 'HACCESSOR'
The compiler is unable to find the definition of the ULONG_PTR data type. This data type is defined in the Basetsd.h header file that is included with the Platform SDK but is not defined in the version of the Basetsd.h file that is installed with Microsoft Visual C++.
In the Visual C++ settings, the Include directory for the Platform SDK must be above the Include directory for Visual C++ in the search list.

From the Tools menu, click Options and click the Directories tab. In the Show Directories for combo box, click Include files. Make sure that the Platform SDK\Include directory is at the top of the list; this forces the compiler to use the Basetsd.h file from the Platform SDK.
This behavior is by design.

Steps to Reproduce Behavior

  1. Create a new Win32 Console Application in Visual C++. Select the default project type: An empty project.
  2. Add a new Visual C++ source file to the project and then paste in the following code:
    #define DBINITCONSTANTS#define INITGUID#include <oledb.h>#include <sqloledb.h>int main(){   return 0;}					
  3. Build the application. If the Visual C++ Include folder is above the Platform SDK Include folder in the search list, then the error listed in the "Symptoms" section is returned.
ulong ulong_ptr c2146 compilation

Article ID: 255556 - Last Review: 02/28/2014 00:31:17 - Revision: 2.0

  • Microsoft Visual C++ 6.0 Enterprise Edition
  • Microsoft Visual C++ 6.0 Professional Edition
  • Microsoft Visual C++, 32-bit Learning Edition 6.0
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