When my MDI app opens and loads m_wndMenuBar and waiting for the user to open a file to begin file operations, in the MenuBar it has the menuitems like File, View, ....etc.

When the user loads in a file, the app switches from IDR_MAINFRAME to IDR_TRAINS and the menuitems are updated.....but somehow, somewhere, a magic icon shows up which is the main icon I use for the program itself.

I want to add the icon to the IDR_MAINFRAME but can't figure out how or where to add it. I see mainframe.ico in the .rc file but not seeing a correlation of the two menus as to why one would have it but the other not.

Any ideas on how to add the icon to the IDR_MAINFRAME as I like the icon there.