Is it possible to know the current state of the display - enabled or disabled ?
FWH 17.04/xHarbour BCC7
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Antonio, thanks for your help !
The GetDevicePowerState function takes two parameters. The first parameter is a handle monitor. And how to find it ?
Based on this example:
https://stackoverflow.com/questions/31579658/how-do-i-get-the-status-of-a-display
You could do:
#define MONITOR_DEFAULTTOPRIMARY 1
BOOL bResult;
GetDevicePowerState( MonitorFromWindow( FindWindow( 0, 0 ), MONITOR_DEFAULTTOPRIMARY ), &bResult )
https://msdn.microsoft.com/en-us/library/windows/desktop/dd145064(v=vs.85).aspx
https://stackoverflow.com/questions/31579658/how-do-i-get-the-status-of-a-display
You could do:
#define MONITOR_DEFAULTTOPRIMARY 1
BOOL bResult;
GetDevicePowerState( MonitorFromWindow( FindWindow( 0, 0 ), MONITOR_DEFAULTTOPRIMARY ), &bResult )
https://msdn.microsoft.com/en-us/library/windows/desktop/dd145064(v=vs.85).aspx
I have written so:
The function MonitorFromWindow() returns empty. What is my mistake ?
#include "FiveWin.ch"
#define MONITOR_DEFAULTTOPRIMARY 1
function Main()
local bResult
GetDevicePowerState( MonitorFromWindow( FindWindow( 0, 0 ), MONITOR_DEFAULTTOPRIMARY ), @bResult )
return nil
DLL32 Function GetDevicePowerState(hDevice AS DWORD, @bResult AS BOOL) AS BOOL PASCAL FROM "GetDevicePowerState" LIB "kernel32.dll"
DLL32 Function MonitorFromWindow(hDevice AS LONG, pr AS DWORD) AS BOOL PASCAL FROM "GetDevicePowerState" LIB "user32.dll"The function MonitorFromWindow() returns empty. What is my mistake ?
DLL32 Function MonitorFromWindow(hDevice AS LONG, pr AS DWORD) AS BOOL PASCAL FROM "MonitorFromWindow" LIB "user32.dll"
DLL32 Function MonitorFromWindow( hDevice AS LONG, pr AS LONG ) AS LONG PASCAL FROM "MonitorFromWindow" LIB "user32.dll"
Еhank you, corrected. Now the function GetDevicePowerState returns .F. in any case. And when the display is on and when I turn it off by
SendMessage(HWND_BROADCAST, WM_SYSCOMMAND, SC_MONITORPOWER, 2)