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06.22.2007 at 02:14AM PDT, ID: 22650766
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8.8

Turn off monitor does not work..

Asked by sakuya_su in Visual Basic Programming

Tags: , , , ,

I have the following code in a timer, however the code does not seem to turn off the monitor at all? (I mean the code traces into the sendmesage line but nothing happens..

Thanks in advanced!


Dim nChar As Integer
Dim nKey As Long
Dim nText As String
   
    For nChar = 1 To 255
        nKey = GetAsyncKeyState(nChar)
   
        If nKey = -32767 Then
        nText = Chr(nChar)
        ' The next IFs will check if the character code == a specific Hex code for a key
            If nChar = VK_BACK Then
                'EndShelledProcess task_id
                'Timer1.Enabled = False
                If Off = False Then
                    SendMessage Me.hwnd, WM_SYSCOMMAND, SC_MONITORPOWER, MONITOR_OFF
                    Off = True
                Else
                    SendMessage Me.hwnd, WM_SYSCOMMAND, SC_MONITORPOWER, MONITOR_ON
                End If
            End If
        End If
    Next nChar


----------------------------
Const as follows:

Option Explicit

Public Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Public Const SC_MONITORPOWER = &HF170&
Public Const MONITOR_ON = -1&
Public Const MONITOR_OFF = 2&
Public Const WM_SYSCOMMAND = &H112


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[+][-]06.22.2007 at 04:17AM PDT, ID: 19340321

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About this solution

Zone: Visual Basic Programming
Tags: monitor, off, turn, does, work
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Solution Provided By: tward
Participating Experts: 1
Solution Grade: A
 
 
[+][-]06.22.2007 at 04:21AM PDT, ID: 19340339

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[+][-]06.22.2007 at 05:43PM PDT, ID: 19346019

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