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WM_QUERYDRAGICON
The WM_QUERYDRAGICON message is sent to a minimized (iconic) window. The
window is about to be dragged by the user but does not have an icon defined for its
class. An application can return the handle of an icon or cursor. The system
displays this cursor or icon while the user drags the icon.
WM_QUERYDRAGICON
Parameters
This message has no parameters.
Return Values
An application should return the handle of a cursor or icon that Windows is to
display while the user drags the icon. The cursor or icon must be compatible
with the display driver's resolution. If the application returns NULL, the
system displays the default cursor.
Default Action
The DefWindowProc function returns the handle of the default cursor.
Remarks
When the user drags the icon of a window without a class icon, Windows
replaces the icon with a default cursor. If the application requires a different
cursor to be displayed during dragging, it must return the handle of the cursor or
icon compatible with the display driver's resolution. If an application returns
the handle of a color cursor or icon, the system converts the cursor or icon to
black and white. The application can call the LoadCursor or LoadIcon function to load a cursor or icon from the resources in its executable (.EXE)
file and to retrieve this handle.
See Also
DefWindowProc, LoadCursor, LoadIcon
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