Title: How to transition the system from the working state to the standby/ hibernate state
function SetSuspendState(
Hibernate: Boolean,
ForceCritical: Boolean,
DisableWakeEvent: Boolean);
{ Parameters:
Hibernate: If this parameter is TRUE, the system hibernates.
If the parameter is FALSE, the system is suspended.
ForceCritical: If this parameter is TRUE, the system suspends operation immediately;
if it is FALSE, the system broadcasts a PBT_APMQUERYSUSPEND event to
each application to request permission to suspend operation.
DisableWakeEvent: If this parameter is TRUE, the system disables all wake events.
If the parameter is FALSE, any system wake events remain enabled.
Windows NT/2000/XP: Included in Windows 2000 and later.
Windows 95/98/Me: Included in Windows 98 and later.
}
var
_SetSuspendState: function (Hibernate, ForceCritical, DisableWakeEvent: BOOL): BOOL
stdcall = nil;
function LinkAPI(const module, functionname: string): Pointer; forward;
function SetSuspendState(Hibernate, ForceCritical,
DisableWakeEvent: Boolean): Boolean;
begin
if not Assigned(_SetSuspendState) then
@_SetSuspendState := LinkAPI('POWRPROF.dll', 'SetSuspendState');
if Assigned(_SetSuspendState) then
Result := _SetSuspendState(Hibernate, ForceCritical,
DisableWakeEvent)
else
Result := False;
end;
function LinkAPI(const module, functionname: string): Pointer;
var
hLib: HMODULE;
begin
hLib := GetModulehandle(PChar(module));
if hLib = 0 then
hLib := LoadLibrary(PChar(module));
if hLib 0 then
Result := getProcAddress(hLib, PChar(functionname))
else
Result := nil;
end;
Usage Examples:
procedure TForm1.Button1Click(Sender: TObject);
begin
SetSuspendState(True, False, False);
end;