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Check status of special keys/de

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Dieser Artikel beschäftigt sich mit der Windowsprogrammierung.

Die Prozeduren ermitteln den Status der Tasten:

Beispiel:

pascal
uses
  Windows, ...;

   ...

function funLowOrderBitSet(intWert: integer): boolean; inline;
begin
  Result := (intWert and 1 > 0);
end;

// ermittelt, ob die Caps-Lock-Taste aktiv ist
function funCapsLock: boolean;
begin
  Result := funLowOrderBitSet(GetKeyState(VK_CAPITAL));
end;

// ermittelt, ob die Einfügen-Taste aktiv ist
function funInsertOn: boolean;
begin
  Result := funLowOrderBitSet(GetKeyState(VK_INSERT));
end;

// ermittelt, ob die Num-Lock-Taste aktiv ist
function funNumLock: boolean;
begin
  Result := funLowOrderBitSet(GetKeyState(VK_NUMLOCK));
end;

// ermittelt, ob die Scoll-Lock-Taste aktiv ist
function funScrollLock: boolean;
begin
  Result := funLowOrderBitSet(GetKeyState(VK_SCROLL));
end;
  
  ...

From the Free Pascal wiki, page "Check status of special keys/de", as it stood on 2020-02-10 after a change by Trev, out of the wiki's dump of 2024-05-26. Copyright stays with the author who wrote it, according to the old wiki's Licensing page. If you have concerns about this material, message the admin.

Revision 1, last changed by WikiArchive .

Edited on wiki.freepascal.org by 3 people, 2013–2020

From the official wiki's backup of 26 May 2024: who edited this page there, and when. Edits made there after that date were not recorded, and the earlier versions are not shown here; the main page says why.

WhenWhoWhat changed
OlafCreated page
Olaf (minor)
Olaf (minor)
Olaf (minor)
FTurtle
TrevFixed syntax highlighting; deleted category already in page template (minor)

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