WM SHOW
This message occurs when the WS_VISIBLE state of a window is being changed.
Syntax
- param1
- USHORT usshow /* Show indicator. */
- param2
- ULONG ulReserved /* Reserved value, should be 0. */
Parameters
- usshow (USHORT)
- Show indicator.
- TRUE
- Show the window
- FALSE
- Hide the window.
- ulReserved (ULONG)
- Reserved value, should be 0.
Returns
- ulReserved (ULONG)
- Reserved value, should be 0.
Remarks
The message is sent after the visibility state has changed.
In this context, the terms "shown" or "hidden" refer to the state of the WS_VISIBLE style bit. This message is not sent when a window is obscured by other windows above it.
Default Processing
The default window procedure takes no action on this message, other than to set ulReserved to 0.