首先，記錄一個網址，感覺很有用，大部分的文件路徑相關函數，裏面都有源代碼。

https://msdn.microsoft.com/en-us/library/windows/desktop/bb773746(v=vs.85).aspx

1、完整路徑，去除後綴名 PathRemoveExtensionA

1. #include <iostream>//cout函數所需
2. #include "atlstr.h" //PathRemoveExtensionA函數所需
4. using namespace std;
6. void main(void)
7. {
8. char buffer_1[] = "C:\\TEST\\sample.txt";
9. char *lpStr1;
10. lpStr1 = buffer_1;
11. cout << "The path with extension is : " << lpStr1 << endl;
12. PathRemoveExtensionA(lpStr1);
13. cout << "\nThe path without extension is : " << lpStr1 << endl;
14. system("pause");
15. }

OUTPUT:
==================
The path with extension is          : C:\TEST\sample.txt
The path without extension is       : C:\TEST\sample

2、完整文件路徑，獲得目錄

1. #include <iostream>//cout函數所需
2. #include "atlstr.h" //PathRemoveFileSpecA函數所需
4. using namespace std;
6. void main(void)
7. {
8. char buffer_1[] = "C:\\TEST\\sample.txt";
9. char *lpStr1;
10. lpStr1 = buffer_1;
11. cout << "The path with file spec is : " << lpStr1 << endl;
12. PathRemoveFileSpecA(lpStr1);
13. cout << "\nThe path without file spec is : " << lpStr1 << endl;
14. //註意如果獲得了目錄，需要得到另一個文件路徑時
15. string filename = lpStr1;
16. filename = filename + "\\samle.txt";
17. system("pause");
18. }

OUTPUT:
==================
The path with file spec is          : C:\TEST\sample.txt
The path without file spec is       : C:\TEST

3、獲取dll所在路徑的兩種方式

（1）需要dll入口函數的句柄

1. char szPath[MAX_PATH];
2. GetModuleFileNameA(dllhandle, szPath, MAX_PATH);//BOOL APIENTRY DllMain(HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserved) //dll入口函數

（2）無需dll入口函數的句柄，dll內任意函數都可

1. EXTERN_C IMAGE_DOS_HEADER __ImageBase;//申明為全局變量
2. char DllPath[MAX_PATH] = { 0 };
3. GetModuleFileNameA((HINSTANCE)&__ImageBase, DllPath, _countof(DllPath))

去除路徑中的後綴名和獲取路徑目錄