June 2001
Intermediate to advanced
706 pages
24h 10m
English
Content preview from Subclassing and Hooking with Visual BasicBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Name
Public Const WM_KEYDOWN = &H100
Synopsis
-
wParam Contains the virtual key code of the key pressed.
-
lParam Contains bit flags for the key pressed. The bit flags are defined as follows:
- 0-15
Number of times the key is repeated
- 16-23
Scan code
- 24
Indicates if the key pressed is an extended key
- 25-28
Reserved
- 29
Always 0 for
WM_KEYDOWNmessages- 30
The previous key state; 1 if the key was already pressed before this message was posted, otherwise
- 31
Always 1 for
WM_KEYDOWNmessages- Description
Posted to a window indicating that a non-system key was pressed (a nonsystem key is one that is pressed while the ALT key is not being pressed).
- Return Value
0 only if the application processes this message.
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