Step 5: Master PCMINFO and INKINGINFO Structures

Having created a master PCMINFO structure and a master INKINGINFO structure, DefWindowProc sends one more PE_GETPCMINFO message and PE_GETINKINGINFO message to the parent window that contains the child targets. This provides the parent window a final opportunity to examine and change, if necessary, the system's assumptions about the impending inking event. For example, the parent window can specify a default ink color in the INKINGINFO structure or set an exclusion region around a screen object that had not, for some reason, handled the PE_GETPCMINFO message.

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