VS2008中编译出现错误 error C2664
error C2664: 'CWnd::MessageBoxW' : cannot convert parameter 1 from 'const char [9]' to 'LPCTSTR'
那一行是MessageBox("not open", 0, 0);
还有 error C2664: 'FindWindowW' : cannot convert parameter 2 from 'const char [8]' to 'LPCWSTR'
代码是HWND m_hWnd = FindWindow(NULL, "capture");
还有错误名字后面为什么加W啊?