How to open a dialog from another dialog (by button click) in MFC ?

I would concur with CPAllini's response with an adjustment.

CPallini wrote:

Assuming your dialog has a parent window, then, on button click, you should:

1. Notify to the parent window that the other dialog should be open (you may set a flag, for instance).
2. Close the current dialog.

I would not, however, set a flag to notify the parent window. Instead I would either:

1) Send the parent a Window's message. This requires you to use a custom windows message and implement a handler for it in the parent.

or

2) Call a method of the parent dialog's object. This requires that the child dialog was previously provided with a properly typed reference or pointer to the parent dialog.

I would prefer option 1 as it does not seem to require as quite as much coupling between the classes.


If you do opt for Jast_in's answer, make sure you do pay attention to exactly when & how you will see that the hidden window gets redisplayed or closed.

Maybe I didn't understand what you need to implement exactly.
If "show/hide" is about your parent application then my first post will work. If "show/hide" connected only to dialogs open due to button pressing then you have to keep open dialog to make the dialog hide.
Then ShowWindow(BOOL) will work surely.

Assuming your dialog has a parent window, then, on button click, you should:

1. Notify to the parent window that the other dialog should be open (you may set a flag, for instance).
2. Close the current dialog.

The parent window will eventually open the other dialog.
:)