{
The LockWorkStation function locks the workstation's display,
protecting it from unauthorized use.
This function has the same result as pressing Ctrl+Alt+Del and
clicking Lock Workstation.
To unlock the workstation, the user must log in.
Windows NT/2000/XP: Included in Windows 2000 and later.
Windows 95/98/Me: Unsupported.
}
procedure TForm1.Button1Click(Sender: TObject); begin LockWorkStation; end;
{ Loading LockWorkStation dynamically}
function LockWS: Boolean; // by Thomas Stutz, SDC type TLockWorkStation = function: Boolean; var hUser32: HMODULE;
LockWorkStation: TLockWorkStation; begin // Here we import the function from USER32.DLL hUser32 := GetModuleHandle('USER32.DLL'); if hUser32 <> 0 then
begin @LockWorkStation := GetProcAddress(hUser32, 'LockWorkStation'); if @LockWorkStation <> nil then
begin LockWorkStation;
Result := True; end; end; end;