Please expert guidance, why generate success, but not pop-up window, thank you-CodePudding

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Please expert guidance, why generate success, but not pop-up window, thank you

Time：12-20

# include

The class MyApp: public CWinApp
{
Virtual BOOL lnitlnstance ()
{
CFrameWnd * pWnd=new CFrameWnd;

PWnd -> Create (NULL, L "hello");

PWnd -> ShowWindow (SW_SHOW);
This -> m_pMainWnd=pWnd;

Return TRUE;

}

};

MyApp theApp;

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