如何在DLL中，获取DLL本身的路径以及调用DLL的文件的路径呢？主要通过GetModuleFileName(HMODULEhModule,LPTSTR lpFilename,DWORD
nSize)函数来获取，根据hModule参数来辨别是DLL本身还是DLL的调用者。
当hModule 为NULL时候 获取到路径为调用者，当hModule为main入口的
BOOL APIENTRY DllMain( HMODULE hModule,
DWORD
ul_reason_for_call,
LPVOID lpReserved)
中的hModule的时候，获取到的路径是DLL本身的路径。实例效果如下：
DLL文件的核心代码如下：
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BOOL
APIENTRY DllMain( HMODULE
hModule, DWORD
ul_reason_for_call, LPVOID
lpReserved ){ TCHAR
pCallFileName[MAX_PATH]; TCHAR
pDllFileName[MAX_PATH]; ::GetModuleFileName(NULL,pCallFileName,MAX_PATH); ATL::CString strCall = pCallFileName; strCall = L"调用EXE:"
+ strCall; ::GetModuleFileName(hModule,pDllFileName,MAX_PATH); ATL::CString strTips = pDllFileName; strTips = L"被调用DLL："+strTips; ::MessageBox(NULL,strCall+L"\n"+strTips,L"MyDLL.dll",MB_OK); switch
(ul_reason_for_call) { case
DLL_PROCESS_ATTACH: case
DLL_THREAD_ATTACH: case
DLL_THREAD_DETACH: case
DLL_PROCESS_DETACH: break; } return
TRUE;} |
调用DLL文件的程序调用DLL代码如下：
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//静态库调用#include "../LibTest/lib.h"#pragma comment(lib,"../release/LibTest.lib")//指定与静态库一起链接//dll 的静态调用#pragma comment(lib,"../release/MyDLL.lib")extern
"C" _declspec(dllexport) int
sub(int
x,int y);//dll的动态调用typedef
int(*lpSubFun)(int,int);//宏定义函数指针类型int
_tmain(int
argc, _TCHAR* argv[]){ //静态库调用 //int rs = add(5,10); //cout << rs <<endl; //dll的静态调用 //int rs2 = sub(100,33); //cout << rs2 <<endl; //dll的动态调用: LoadLibrary-GetProcAddress-FreeLibrary” //系统Api提供的三位一体“DLL加载-DLL函数地址获取-DLL释放”方式 HINSTANCE
hDll;//DLL句柄 lpSubFun subFunc;//函数指针 hDll = LoadLibrary(L"../release/MyDLL.dll"); if(hDll!=NULL) { subFunc = (lpSubFun)GetProcAddress(hDll,"sub"); } if(subFunc!=NULL) { int
rs3 = sub(100,88); //cout << rs3 << endl; } //cin.get(); return
0;} |
原文：http://www.cnblogs.com/JczmDeveloper/p/3566529.html