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
1 #include "stdafx.h" 2 #include <tchar.h> 3 4 UINT GetProperty(MSIHANDLE hInstall) 5 { 6 TCHAR* szValueBuf = NULL; 7 DWORD cchValueBuf = 0; 8 UINT uiStat = MsiGetProperty(hInstall, TEXT("ProductName"), TEXT(""), &cchValueBuf); 9 //cchValueBuf now contains the size of the property's string, without null termination 10 if (ERROR_MORE_DATA == uiStat) 11 { 12 ++cchValueBuf; // add 1 for null termination 13 szValueBuf = new TCHAR[cchValueBuf]; 14 if (szValueBuf) 15 { 16 uiStat = MsiGetProperty(hInstall, TEXT("ProductName"), szValueBuf, &cchValueBuf); 17 } 18 } 19 20 MessageBox(NULL, szValueBuf, _T("Im GetProperty"), MB_OK); 21 22 if (ERROR_SUCCESS != uiStat) 23 { 24 if (szValueBuf != NULL) { 25 delete[] szValueBuf; 26 27 } 28 return ERROR_INSTALL_FAILURE; 29 } 30 31 delete[] szValueBuf; 32 33 return ERROR_SUCCESS; 34 35 } 36 37 UINT _stdcall SampleFunction2(LPCTSTR productName, MSIHANDLE hInstall) 38 { 39 MessageBox(NULL, _T("Hello, welcome to C-TEST") ,_T("I'm Sample Function2's message"), MB_OK); 40 MessageBox(NULL, productName ,_T("I'm Sample Function2's break point"), MB_OK); 41 GetProperty(hInstall); 42 return 0; 43 }
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。
