TimeDelay in Selecting CheckBox

Question

Hi To All,
I am having 5 CheckBoxes in my screen..In that 5th CheckBox is SelectAll checkbox. If i select that 5th Checkbox, al the other 4 Checkboxes should be selected at once..Wats my problem is, if i select the 5th checkbox after 4 to 5 seconds all the other 4 checkboxes got checked..How to overcome this time delay is selecting checkbox...Here is my source...
    Try
            Conv_Form = app.Forms.Item("AWReport")
            Conv_Form.Freeze(True)
            Dim Chk1 As SAPbouiCOM.CheckBox = Conv_Form.Items.Item("chk1").Specific
            Dim Chk2 As SAPbouiCOM.CheckBox = Conv_Form.Items.Item("chk2").Specific
            Dim Chk3 As SAPbouiCOM.CheckBox = Conv_Form.Items.Item("chk3").Specific
            Dim Chk4 As SAPbouiCOM.CheckBox = Conv_Form.Items.Item("chk4").Specific
            Dim ChkALL As SAPbouiCOM.CheckBox = Conv_Form.Items.Item("chkAll").Specific
            Select Case pVal.EventType
                Case SAPbouiCOM.BoEventTypes.et_ITEM_PRESSED
                    If pVal.ItemUID = "chkALL" And pVal.BeforeAction = False Then
                        If ChkALL.Checked = "True" Then
                            Chk1.Checked = "True"
                            Chk2.Checked = "True"
                            Chk3.Checked = "True"
                            Chk4.Checked = "True"
                        Else
                            Chk1.Checked = "False"
                            Chk2.Checked = "False"
                            Chk3.Checked = "False"
                            Chk4.Checked = "False"
                            ChkALL.Checked = "False"
                        End If
                    End If
             Conv_Form.Freeze(False)
        Catch ex As Exception
            Conv_Form.Freeze(False)
        End Try
    End Sub

Answer 1

Hi Petr,
Sorry, I dint think in that way, wat u had mentioned........Here is my issue.......
  What my need is if i check the SelectAll checkbox al the other checkboxes shd be checked..If i uncheck the SelectAll, al shd get unchecked..I found somewhat difficulties while doing this issue..So i had chaged my need..If i uncheck the SelectAll checkbox al other check boxes will not be unchecked. Here is my source...
Try
     If pVal.BeforeAction = False Then
       Select Case pVal.EventType
         Case SAPbouiCOM.BoEventTypes.et_ITEM_PRESSED
              Select Case pVal.ItemUID
                   Case "chkALL"
                      If ChkALL.Checked = True Then
                         Conv_Form.Freeze(True)
                         Chk1.Checked = True
                         Chk2.Checked = True
                         Chk3.Checked = True
                         Chk4.Checked = True
                         Conv_Form.Freeze(False)
                      End if
   Case "chk1"
   If Chk1.Checked = False And ChkALL.Checked = True Then
   ChkALL.Checked = False
   End If
   Case "chk2"
   If Chk2.Checked = False And ChkALL.Checked = True Then
   ChkALL.Checked = False
   End If
   Case "chk3"
   If Chk3.Checked = False And ChkALL.Checked = True Then
   ChkALL.Checked = False
   End If
   Case "chk4"
   If Chk4.Checked = False And ChkALL.Checked = True Then
   ChkALL.Checked = False
   End If