C++ DLL 获取 MSI Property

VS2010 创建  C++, Win32 DLL工程C-TEST。

Stdafx.h中，在<windows.h>之后 添加引用。

#include <msi.h>
#include <msiquery.h>

C-TEST.cpp

 #include "stdafx.h"
 #include <tchar.h>

 UINT GetProperty(MSIHANDLE hInstall)
 {
     TCHAR* szValueBuf = NULL;
     DWORD cchValueBuf = ;
     UINT uiStat =  MsiGetProperty(hInstall, TEXT("ProductName"), TEXT(""), &cchValueBuf);
     //cchValueBuf now contains the size of the property's string, without null termination
     if (ERROR_MORE_DATA == uiStat)
     {
         ++cchValueBuf; // add 1 for null termination
         szValueBuf = new TCHAR[cchValueBuf];
         if (szValueBuf)
         {
             uiStat = MsiGetProperty(hInstall, TEXT("ProductName"), szValueBuf, &cchValueBuf);
         }
     }

     MessageBox(NULL, szValueBuf, _T("Im GetProperty"), MB_OK);

     if (ERROR_SUCCESS != uiStat)
     {
         if (szValueBuf != NULL) {
             delete[] szValueBuf;

         }
         return ERROR_INSTALL_FAILURE;
     }

     delete[] szValueBuf;

     return ERROR_SUCCESS;

 }

 UINT _stdcall SampleFunction2(LPCTSTR productName, MSIHANDLE hInstall)
 {
     MessageBox(NULL, _T("Hello, welcome to C-TEST") ,_T("I'm Sample Function2's message"), MB_OK);
     MessageBox(NULL, productName ,_T("I'm Sample Function2's break point"), MB_OK);
     GetProperty(hInstall);
     return ;
 }

添加 C-TEST.def 文件

LIBRARY "C-TEST"
EXPORTS
SampleFunction2

编译，

1） 如果没有 #include <tchar.h>，会出现 error C3861: '_T': identifier not found

2）error LNK1120: 1 unresolved externals

解决方案：

工程右键 Property -> Configuration Properties -> Linker / Input / Additional Dependencies

添加  msi.lib

编译通过。