Pointer in MFC

Pointer in MFC

The following table summarizes the methods for obtaining class pointers in MFC, which are comprehensive, concise, and of great reference value.

From this class:	You can access this class using:
	Cwinapp	Cmainframe	Cchildframe	Cdocument	Cview
Cwinapp		Afxgetmainwnd () orm_pmainwnd	Afxgetmainwnd ()-> mdigetactive ()	Afxgetmainwnd ()-> getactiveview ()-> getdocument ()	Afxgetmainwnd ()-> getactiveview ()
Cmainframe	Afxgetapp () ortheapp		Mdigetactive () orgetactiveframe ()	SDI: getactiveview ()-> getdocument () MDI: mdigetactive ()-> getactiveview ()-> getdocument ()	SDI: getactiveview () MDI: mdigetactive ()-> getactiveview ()
Cchildframe	Afxgetapp () ortheapp	Getparentframe ()		Getactiveview ()-> getdocument ()	Getactiveview ()
Cdocument	Afxgetapp () ortheapp	Afxgetmainwnd ()	Afxgetmainwnd ()-> mdigetactive ()		Position Pos = getfirstviewposition (); Getnextview (POS ); (See note below)
Cview	Afxgetapp () ortheapp	Afxgetmainwnd ()	Getparentframe ()	Getdocument ()
Any other class	Afxgetapp ()	Afxgetmainwnd ()	Afxgetmainwnd ()-> mdigetactive () orafxgetmainwnd ()-> getactiveframe ()	SDI: afxgetmainwnd ()-> getactiveview ()-> getdocument () MDI: afxgetmainwnd ()-> mdigetactive ()-> getactiveview ()-> getdocument ()	SDI: afxgetmainwnd ()-> getactiveview () MDI: afxgetmainwnd ()-> mdigetactive ()-> getactiveview ()
	Note:To access only the current view, the document class can call afxgetmainwnd ()-> getactiveview () from a SDI application or afxgetmainwnd ()-> mdigetactive ()-> getactiveview () from a MDI application.