混用Int与IntPtr导致GetProcAddress始终返回null

 

注意NET某些类型在不同平台上的长度

NET中用句柄用得最多的是在DLLIMPORT中,混用int与intptr可能会导致某些API声明在X64平台中表现不正常,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;  

}  

 

 

 

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

 

 

转载于:https://www.cnblogs.com/QinQouShui/p/8391660.html

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