[vtkusers] How to pick a point in MFC?

[熊俊（jun xiong）]

hello,vtkusers!
	I am a new user in vtk.Now i want to use vtkPointPicker to 
get coordinates of point on the surface.
	I only know how to use it in Dos-bases application.But the
 decleration isn't the  same for windows-based applications.
 Anyone point me to some examples of the use of pointpicker 
in MFC?

thanks! 

　　　　　　　　Jun xiong
　　　　　　　　　2003-12-01