混用Int與IntPtr導致GetProcAddress始終返回null

 

注意NET某些類型在不同平臺上的長度

NET中用句柄用得最多的是在DLLIMPORT中，混用int與intptr可能會導致某些API聲明在X64平臺中表現不正常，如

[DllImport("Kernel32")]

public static extern IntPtr LoadLibrary(string funcname);

[DllImport("Kernel32")]

public static extern long GetProcAddress(long handle, string funcname);

 

 int _tmain(int argc, _TCHAR* argv[])  

 {  

     int i = 0;  

     i = sizeof(int);                // x86:4        x64:4  

     i = sizeof(long);           // x86:4        x64:4  

     i = sizeof(void*);          // x86:4        x64:8  

     i = sizeof(short);          // x86:2        x64:2  

     i = sizeof(float);          // x86:4        x64:4  

     i = sizeof(double);         // x86:8        x64:8  

     i = sizeof(int*);           // x86:4        x64:8  

     i = sizeof(WORD);           // x86:2        x64:2  

     i = sizeof(DWORD);          // x86:4        x64:4  

     i = sizeof(LONGLONG);       // x86:8        x64:8  

     i = sizeof(HANDLE);         // x86:4        x64:8  

     i = sizeof(HWND);           // x86:4        x64:8  

     i = sizeof(bool);           // x86:1        x64:1  

     i = sizeof(char);           // x86:1        x64:1  

       

     return 0;  

 }  

 

 

 

參考：http://blog.csdn.net/road2010/article/details/21406639