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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| Yes
| Win32s
| No
| Import Library
| -
| Header File
| winuser.h
| Unicode
| No
| Platform Notes
| None
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WM_SETHOTKEY
An application sends a WM_SETHOTKEY message to a window to associate a hot key
with the window. When the user presses the hot key, the system activates the
window.
WM_SETHOTKEY
wParam = (WPARAM) MAKEWORD(vkey, modifiers) // virtual-key code and
modifiers of hot key
lParam = 0; // not used; must be zero
Parameters
Value of wParam. Specifies the virtual-key code and modifiers of the hot key to associate
with the window. The virtual-key code is in the low byte of the parameter and the
modifier flags are in the high byte. Setting this parameter to NULL removes the
hot key associated with a window. The modifier byte can be a combination of
the following flags:
Value
| Meaning
| HOTKEYF_ALT
| ALT key
| HOTKEYF_CONTROL
| CTRL key
| HOTKEYF_EXT
| Extended key
| HOTKEYF_SHIFT
| SHIFT key
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Return Values
The return value is one of the following:
Value
| Meaning
|  1
| The function is unsuccessful  the hot key is invalid.
| ..0
| The function is unsuccessful the window is invalid.
| ..1
| The function is successful, and no other window has the same hot key.
| ..2
| The function is successful, but another window already has the same hot key.
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Remarks
A hot key cannot be associated with a child window.
VK_ESCAPE, VK_SPACE, and VK_TAB are invalid hot keys.
When the user presses the hot key, the system generates a WM_SYSCOMMAND
message with wParam equal to SC_HOTKEY.
A window can only have one hot key. If the window already has a hot key
associated with it, the new hot key replaces the old one. If more than one window has
the same hot key, the window that is activated by the hot key is random.
These hot keys are unrelated to the hot keys set by RegisterHotKey.
See Also
RegisterHotKey, WM_GETHOTKEY, WM_SYSCOMMAND
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