Forcer une fenêtre à passer en premier plan

Windows 98/2000 doesn't want to foreground a window when some other
window has the keyboard focus.
ForceForegroundWindow is an enhanced SetForeGroundWindow function .

function ForceForegroundWindow(hwnd: THandle): boolean;
const
SPI_GETFOREGROUNDLOCKTIMEOUT = $2000;
SPI_SETFOREGROUNDLOCKTIMEOUT = $2001;
var
ForegroundThreadID: DWORD;
ThisThreadID : DWORD;
timeout : DWORD;


begin
if IsIconic(hwnd) then ShowWindow(hwnd, SW_RESTORE);
if GetForegroundWindow = hwnd then Result := true
else begin

// Windows 98/2000 doesn't want to foreground a window when some other
// window has keyboard focus

if ((Win32Platform = VER_PLATFORM_WIN32_NT) and (Win32MajorVersion > 4)) or
((Win32Platform = VER_PLATFORM_WIN32_WINDOWS) and
((Win32MajorVersion > 4) or ((Win32MajorVersion = 4) and
(Win32MinorVersion > 0)))) then
begin

// Code from Karl E. Peterson, www.mvps.org/vb/sample.htm
// Converted to Delphi by Ray Lischner
// Published in The Delphi Magazine 55, page 16

Result := false;
ForegroundThreadID :=
GetWindowThreadProcessID(GetForegroundWindow,nil);
ThisThreadID := GetWindowThreadPRocessId(hwnd,nil);
if AttachThreadInput(ThisThreadID, ForegroundThreadID, true) then
begin
BringWindowToTop(hwnd); // IE 5.5 related hack
SetForegroundWindow(hwnd);
AttachThreadInput(ThisThreadID, ForegroundThreadID, false);
Result := (GetForegroundWindow = hwnd);
end;
if not Result then begin

// Code by Daniel P. Stasinski

SystemParametersInfo(SPI_GETFOREGROUNDLOCKTIMEOUT, 0, @timeout, 0);
SystemParametersInfo(SPI_SETFOREGROUNDLOCKTIMEOUT, 0, TObject(0),
SPIF_SENDCHANGE);
BringWindowToTop(hwnd); // IE 5.5 related hack
SetForegroundWindow(hWnd);
SystemParametersInfo(SPI_SETFOREGROUNDLOCKTIMEOUT, 0,
TObject(timeout), SPIF_SENDCHANGE);
end;
end
else begin
BringWindowToTop(hwnd); // IE 5.5 related hack
SetForegroundWindow(hwnd);
end;

Result := (GetForegroundWindow = hwnd);
end;
end; { ForceForegroundWindow }
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Mise a jour22/11/2001
VisualisationVu 1253 fois
PublicInternaute zz
CategorieDelphi - Trucs et astuces - Systeme
Auteur de l'article
SwissDelphiCenter SwissDelphiCenter
connecté le 02/11/2011
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