dll封装的模态窗体Windows任务栏不显示，而非模态窗体不能截获，怎么办？

void

showintaskbar( HWND hwnd, int bshow )

{

	HRESULT hr;

	ITaskbarList* pTaskbarList;



	hr = CoCreateInstance( CLSID_TaskbarList, NULL, CLSCTX_INPROC_SERVER, IID_ITaskbarList, ( void** )&pTaskbarList );



	pTaskbarList->HrInit( );



	if( bshow )

	{

		pTaskbarList->AddTab( hwnd );

	}

	else

	{

		pTaskbarList->DeleteTab( hwnd );

	}



	pTaskbarList->Release();

}