Mega Code Archive
How to simulate ALT + TAB
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Title: How to simulate ALT + TAB
var
Index: INTEGER;
//Save description of all active windows to listbox
function EnumWindowsProc(Wnd: HWND; lParam: lParam): BOOL; stdcall;
var
Bezeichnung: array[0..200] of Char;
begin
if (IsWindowVisible(Wnd) or IsIconic(wnd)) and
((GetWindowLong(Wnd, GWL_HWNDPARENT) = 0) or
(GetWindowLong(Wnd, GWL_HWNDPARENT) = GetDesktopWindow)) and
(GetWindowLong(Wnd, GWL_EXSTYLE) and WS_EX_TOOLWINDOW = 0) then
begin
GetWindowText(Wnd, Bezeichnung, 256);
if Bezeichnung 'GDI+ Window' then
Form1.Listbox1.Items.Append(Bezeichnung);
end;
end;
procedure TForm1.Refresh;
begin
Listbox1.Clear;
EnumWindows(@EnumWindowsProc, 1);
end;
Usage Examples: 1.Simulate ALT + TAB
procedure Forwardtab;
var
hWnd: DWORD;
begin
Refresh;
if Index .Count - 1 then
Inc(Index)
else
Index := 0;
hWnd := FindWindow(nil, PChar(Listbox1.Items[Index]));
if hWnd 0 then
begin
windows.ShowWindow(hwnd, 1);
windows.SetForegroundWindow(hWnd);
windows.SetFocus(hWnd);
end;
end;
Usage Examples: 2.Simulate ALT + TAB (Backwards)
procedure Backwardtab;
var
hWnd: DWORD;
begin
Refresh;
if Index 0 then
Dec(Index)
else
Index := listbox1.Count - 1;
hWnd := FindWindow(nil, PChar(Listbox1.Items[Index]));
if hWnd 0 then
begin
windows.ShowWindow(hwnd, 1);
windows.SetForegroundWindow(hWnd);
windows.SetFocus(hWnd);
end;
end;
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