Mega Code Archive
How to determine the position of the taskbar
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Title: How to determine the position of the taskbar
uses
ShellAPI;
procedure TForm1.Button1Click(Sender: TObject);
var
tabd: TAppBarData;
PosString: string;
begin
FillChar(tabd, SizeOf(TAppBarData), 0);
tabd.cbSize := SizeOf(TAppBarData);
if SHAppBarMessage(ABM_GETTASKBARPOS, Tabd) = 0 then Exit;
with Tabd.rc do
PosString := Format(' (%d, %d);(%d, %d) ', [Left, Top, Right, Bottom]);
case tabd.uEdge of
ABE_LEFT: ShowMessage('Left Position' + PosString);
ABE_TOP: ShowMessage('Top Position' + PosString);
ABE_RIGHT: ShowMessage('Right Position' + PosString);
ABE_BOTTOM: ShowMessage('Bottom Position' + PosString);
end;
end;
2. With FindWindow, GetWindowRec
type
TTaskBarPos = (_TOP, _BOTTOM, _LEFT, _RIGHT, _NONE);
function GetTaskBarPos: TTaskBarPos;
var
hTaskbar: HWND;
T: TRect;
scrW, scrH: integer;
begin
hTaskBar := FindWindow('Shell_TrayWnd', nil);
if hTaskbar 0 then
begin
GetWindowRect(hTaskBar, T);
ScrW := Screen.Width;
ScrH := Screen.Height;
if (T.Top scrH div 2) and (T.Right = scrW) then
Result := _BOTTOM
else if (T.Top div 2) and (T.Bottom = scrW div 2) then
Result := _TOP
else if (T.Left div 2) and (T.Top = 0) then
Result := _LEFT
else // the last "if" is not really needed
if T.Left = ScrW div 2 then
Result := _RIGHT;
end;
end;
procedure TForm1.Button5Click(Sender: TObject);
var
TaskBarPos: TTaskBarPos;
begin
TaskBarPos := GetTaskBarPos;
case TaskBarPos of
_LEFT: ShowMessage('Left Position');
_TOP: ShowMessage('Top Position');
_RIGHT: ShowMessage('Right Position');
_BOTTOM: ShowMessage('Bottom Position');
end;
end;
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