C#访问非托管DLL

LRESULT CallWindowProc( WNDPROC lpPrevWndFunc,

    HWND hWnd,

    UINT Msg,

    WPARAM wParam,

    LPARAM lParam

);

[DllImport("kernel32")]

public extern static int LoadLibrary(string lpLibFileName);

[DllImport("kernel32")]

public extern static bool FreeLibrary(int hLibModule);

[DllImport("kernel32", CharSet=CharSet.Ansi)]

public extern static int GetProcAddress(int hModule, string lpProcName);

[DllImport("user32", EntryPoint="CallWindowProc")] 

public static extern int CallWindowProc(int lpPrevWndFunc, int hwnd, int MSG, int wParam, int lParam);



private void button1_Click(object sender, System.EventArgs e)

{

int hmod=LoadLibrary("*****.dll");

int pFname=GetProcAddress(hmod, "*****");

CallWindowProc(pFname,0,0,0);

FreeLibrary(hmod);

}