KEYDOWNDATA
This structure holds records which represent a key-down event. This structure is retrieved via PEvget and the PEP_structKEYDOWNDATA property when a PEWN_KEYDOWN notification event is being processed.
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typedef struct tagKEYDOWNDATA
{
UINT nChar;
UINT nRepCnt;
UINT nFlags;
} KEYDOWNDATA;
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Parameter
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Description
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nChar
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Specifies the virtual-key code of the given key.
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nRepCnt
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Repeat count (the number of times the keystroke is repeated as a result of the user holding down the key).
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nFlags
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Specifies the scan code, key-transition code, previous key state, and context code, as shown in the following list:
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Value
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Description
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0-7
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Scan code (OEM-dependent value).
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8
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Extended key, such as a function key or a key on the numeric keypad (1 if it is an extended key).
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9-10
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Not used.
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11-12
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Used internally by Windows.
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13
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Context code (1 if the ALT key is held down while the key is pressed; otherwise 0).
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14
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Previous key state (1 if the key is down before the call, 0 if the key is up).
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15
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Transition state (1 if the key is being released, 0 if the key is being pressed).
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For a WM_KEYDOWN message, the key-transition bit (bit 15) is 0 and the context-code bit (bit 13) is 0.
Comments
See Also: PEP_structKEYDOWNDATA.
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