Searching up through richtextbox (not down)

I've been trying to figure this out lately by looping a richtextboxfinds code replacing the integer with a value -1 than the integer before it after the starting string in that code. But for some reason I can't get it to loop through my text upwards.

It loops down through the text fine, however i'm not satisfied with that loop either, it seems a bit buggy.

vb Code:

Dim x As Integer
        If searchdown.Checked Then
            'We'll define fOption as the richtextbox finds option for searching the text
            Dim fOption As RichTextBoxFinds = 0
            If ckCaseSensitive.Checked Then fOption = fOption Or RichTextBoxFinds.MatchCase
            If ckWholeWord.Checked Then fOption = fOption Or RichTextBoxFinds.WholeWord
            x = Form1.RichTextBox1.Find(txtFind.Text, PlaceHolder, fOption)
 
            PlaceHolder = Form1.RichTextBox1.SelectionStart + 1
 
            If x < 0 Then
                If MessageBox.Show("There are no more occurances of the text " & txtFind.Text & vbCrLf & "or the text does not exist in the document. Would you like to start from the beginning of the document?", "Not found", MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button1) = Windows.Forms.DialogResult.Yes Then
                    PlaceHolder = 0
                    btnFindNext.PerformClick()
                End If
            End If

With using selection start -1 to get the integer to reduce in value it doesn't seem to want to use that placeholder to search upward through the text. And It wouldn't seem that the reverse code for richtextboxfinds would be appropriate for this either, i've tried using the value for it (16) in the code with a few different methods and nothing seemed to work for me.

Anyone want to help me understand what i'm doing wrong here, or if there's anything I could do to better my downsearch/upwardsearch

The down search seems to take 2 clicks on my button handler to actually change the selected text that it finds, and then I used the code for an upward search, it would search one more down upon pressing my "search up" button, before not doing anything after that on the next click. So i'd assume something is wrong with the down search function as well.

try this:

vb Code:

Dim x As Integer
'We'll define fOption as the richtextbox finds option for searching the text
Dim fOption As RichTextBoxFinds = 0
fOption = fOption Or RichTextBoxFinds.MatchCase
fOption = fOption Or RichTextBoxFinds.WholeWord
fOption = fOption Or RichTextBoxFinds.Reverse
x = RichTextBox1.Find(txtFind.Text, startAt, endAt, fOption)
MsgBox(x)

couldn't get that one to work for me, I tried using this

vb Code:

Dim x As Integer
        If searchdown.Checked Then
            'We'll define fOption as the richtextbox finds option for searching the text
            Dim fOption As RichTextBoxFinds = 0
            If ckCaseSensitive.Checked Then fOption = fOption Or RichTextBoxFinds.MatchCase
            If ckWholeWord.Checked Then fOption = fOption Or RichTextBoxFinds.WholeWord
            If searchup.Checked Then fOption = fOption Or RichTextBoxFinds.Reverse
 
            If searchdown.Checked Then
                x = Form1.RichTextBox1.Find(txtFind.Text, PlaceHolder, fOption)
                PlaceHolder = Form1.RichTextBox1.SelectionStart + 1
            ElseIf searchup.Checked Then
                x = Form1.RichTextBox1.Find(txtFind.Text, PlaceHolder, 0, fOption)
                PlaceHolder = Form1.RichTextBox1.SelectionStart - 1
            End If
 
            If x < 0 Then
                If MessageBox.Show("There are no more occurances of the text " & txtFind.Text & vbCrLf & "or the text does not exist in the document. Would you like to start from the beginning of the document?", "Not found", MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button1) = Windows.Forms.DialogResult.Yes Then
                    PlaceHolder = 0
                    btnFindNext.PerformClick()
                End If
            End If
        End If

Still requesting help on this.

sorry i meant to reply earlier... got distracted.
you're using it wrong. when reverse searching, endAt is where it starts searching from + startAt is where it stops searching, like so:

vb Code:

x = Form1.RichTextBox1.Find(txtFind.Text, 0, PlaceHolder, fOption)

Ahh, i've never used the reverse function before, I thought the reverse option would enable it to read the code from the original way, but know to do it in reverse... Thanks lol, that would have really confused me that I was doing it backwards.

Edit: sh*t lol I can't believe how simple that would have been if I would have known that, I understand the code, I just needed to know how reverse works.... I'll put that in my memory for other finding functions/options in my app, thanks buddy. +1 for that.