|
Owner-Drawn Menus and the WM_MEASUREITEM Message
Before Windows displays an owner-drawn menu item for the first time, it sends
the WM_MEASUREITEM message to the window procedure of the window that owns the item's menu. This
message contains a pointer to a MEASUREITEMSTRUCT structure that identifies the item and contains the item data that an
application may have assigned to it. The window procedure must fill the itemWidth and itemHeight members of the structure before returning from processing the message.
Windows uses the information in these members when creating the bounding rectangle in
which an application draws the menu item. It also uses the information to
detect when the user chooses the item.
Related Links
Software for Delphi and C++ Builder developers
Software for Visual Studio .NET developers
Software for Visual Basic 6 developers
Delphi Tips&Tricks
MegaDetailed.NET
TMS Scripter Studio Pro components for Delphi/C++Builder
More Online Helps
Win32 Multimedia Programmer's Reference (mmedia.hlp)
OLE Programmer's Reference (ole.hlp)
Microsoft Windows Pen API Programmer's Reference (penapi.hlp)
Microsoft Windows Sockets 2 Reference (sock2.hlp)
Microsoft Windows Telephony API (TAPI) Programmer's Reference (tapi.hlp)
Unix Manual Pages
|
