How to Compare a Range of Values with a Database

Please Help

I am working on an application for allocating the unallocated frequency from a given frequency range, say 138MHz-138.5MHz. The Gap Between two frequencies should be atleast 0.025MHz. for simplex mode and 5MHz for Duplex mode. Now the problem is that some frequency in this range is already been alloted to the customers. So while allocating a frequency i need to check whether the other allocated frequency falls within the 0.025MHz range to the left or right of the present frequency and discard them if they Do. The unallocated frequency can then be found out and allocated accordingly. But I am finding some problem and my code is not getting Executed. Can somebody help me?? Below is my code snippet.

VB Code:

Private Sub Command2_Click()
Dim F_Cnt As Integer
Dim Sto_Fr As String
Dim i, Flag
Start_F = Text1.Text
End_F = Text2.Text
NO_OF_FREQ = Val(Text3.Text)
Dim Count_R
Value = LowHiVal()
'MsgBox Val(Low_Val)'
'MsgBox Val(Hi_Val)'
 
If Start_F <> "" Or End_F <> "" Then
    If Start_F < Val(Low_Val) Or End_F > Val(Hi_Val) Then
        MsgBox "Value out of Range. Please Enter New Values"
    Else
        F_Cnt = 0
        New_Check = Start_F
        Do While F_Cnt <> NO_OF_FREQ
            If Combo3.Text = "Simplex" Then
                New_Check = New_Check + Val(0.025)
            End If
            If Combo3.Text = "Duplex" Then
                New_Check = New_Check + Val(0.05)
            End If
            Sto_Fr = New_Check
            'MsgBox New_Freq'
            Place_Use = Combo9.Text
            'Search the DB'
            sqlExecuteVHFCheck
            GoTo recordsetSql1
recordsetSql1:
    
        On Error GoTo sqlError
            Data1.RecordSource = sql1
            Data1.Refresh
           
     
     'If the resultset is empty add the value to the frequency table'
       
        'Data1.Recordset.Seek "=", New_Freq'
 
           
            If Data1.Recordset.BOF = True And Data1.Recordset.EOF = True Then
                If Form14.Text1.Text <> "" Then
                     Form14.Text1.Text = Form14.Text1.Text + "MHz, " + Sto_Fr
                ElseIf Form14.Text1.Text = "" Then
                     Form14.Text1.Text = Form14.Text1.Text + Sto_Fr
                ElseIf F_Cnt = NO_OF_FREQ Then
                     Form14.Text1.Text = Form14.Text1.Text + Sto_Fr + "MHz"
                
                End If
                'MsgBox "Unable to Display Form14"'
                'Increment F_Cnt'
                'New_Freq = New_Check'
                For New_Freq = New_Check To (New_Check + 0.025)
                    New_Freq = New_Freq + 0.001
                    sqlExecuteVHF
                    GoTo recordsetSql
recordsetSql:
    
                    On Error GoTo sqlError
                    Data1.RecordSource = sql
                    Data1.Refresh
                    If Data1.Recordset.BOF = True And Data1.Recordset.EOF = True Then
                        'No record Exists'
                        Flag = 1
                    Else
                        MsgBox "Frequency already Alloted."
                        Flag = 0
                        Exit For
                    End If
                Next
                If Flag = 0 Then
                    GoTo Skip
                End If
                'Move Left Side of the Sideband'
           
                For New_Freq = New_Check To (New_Check - 0.025)
                    New_Freq = New_Freq - 0.001
                    sqlExecuteVHF
                    GoTo recordsetSql2
recordsetSql2:
    
                    On Error GoTo sqlError
                    Data1.RecordSource = sql
                    Data1.Refresh
                    If Data1.Recordset.BOF = True And Data1.Recordset.EOF = True Then
                        'No record Exists'
                        
                    Else
                        MsgBox "Frequency in Range already Alloted."
                        'get a new New_Check'
                        Exit For
                    End If
                Next
                
Skip:                F_Cnt = F_Cnt + 1
            Else
                'MsgBox "record Exists"'
            'If resultset is not empty, ignore the value'
            End If
        Loop
    End If
    Else
        MsgBox "Enter Start and End Frequencies"
    
    End If
Form14.Text1.Text = Form14.Text1.Text + "MHz"
Form14.Visible = True
'MsgBox Sto_Fr'
Exit Sub
sqlError:
    
        MsgBox Err.Description
        MsgBox "SQL Error"
    
 
End Sub
 
Private Sub Command4_Click()
Text13.Text = LF_B + LF_R + Amt_H
End Sub

Edit: Added [vbcode][/vbcode] tags for clairty. - Hack

Re: How to Compare a Range of Values with a Database

1. What is LowHiVal()? Is it a function or an array? What is its data type.
2. What are Low_Val and Hi_Val?
3. Please add the "Option Explicit" statement at the top of your code module and make sure you have declared all the variables then post your code again.

Re: How to Compare a Range of Values with a Database

By the way, please use [ vbcode ][ /vbcode ] tags when posting code and use TABs to indent.