Need VB.Net help with detecting vertical text

[#1]

I have a process that detects rotated pages and sets their orientation to 0 but I also need to detect vertical text on a page and act on that. In the test files I an using the page has not been rotated but the text (rasterized) is vertical. Using the Acrobat 11.0 object model through VB.NET, how can I achieve that? The following code does handle where the page has been rotated but does not detect the vertical text. Any help is appreciated.

    Private Sub cmdConvert_Click(sender As Object, e As EventArgs) Handles cmdConvert.Click

        Dim AcroXApp As Acrobat.AcroApp

        Dim AcroXAVDoc As Acrobat.AcroAVDoc

        Dim AcroXPDPage As Acrobat.AcroPDPage

        Dim AcroXPDDoc As Acrobat.AcroPDDoc

        Dim JSO As Object

        AcroXApp = CreateObject("AcroExch.App")

        AcroXApp.Hide()

        AcroXAVDoc = CreateObject("AcroExch.AVDoc")

        AcroXAVDoc.Open(txtTargetFile.Text, "")

        AcroXPDDoc = AcroXAVDoc.GetPDDoc

        JSO = AcroXPDDoc.GetJSObject

        Dim iPageCount = AcroXPDDoc.GetNumPages

        For i = 0 To iPageCount - 1

            Dim rotation = JSO.getPageRotation(i)

            Select Case rotation

                Case 90

                    AcroXPDPage = AcroXPDDoc.AcquirePage(i)

                    Debug.Print("Page " & i & " was set at " & rotation & " degree rotation")

                    AcroXPDPage.SetRotate(0)

                Case 180

                    AcroXPDPage = AcroXPDDoc.AcquirePage(i)

                    Debug.Print("Page " & i & " was set at " & rotation & " degree rotation")

                    AcroXPDPage.SetRotate(0)

                Case 270

                    AcroXPDPage = AcroXPDDoc.AcquirePage(i)

                    Debug.Print("Page " & i & " was set at " & rotation & " degree rotation")

                    AcroXPDPage.SetRotate(0)

            End Select

        Next

        Dim strOutFileName As String = Replace(txtTargetFile.Text, ".pdf", "_Rotated.pdf")

        JSO.SaveAs(strOutFileName)

        AcroXAVDoc.Close(False)

        AcroXApp.Exit()

        AcroXApp = Nothing

        AcroXAVDoc = Nothing

        AcroXPDDoc = Nothing

        JSO = Nothing

    End Sub

[#2]

I have a process that detects rotated pages and sets their orientation to 0 but I also need to detect vertical text on a page and act on that. In the test files I an using the page has not been rotated but the text (rasterized) is vertical. Using the Acrobat 11.0 object model through VB.NET, how can I achieve that? The following code does handle where the page has been rotated but does not detect the vertical text. Any help is appreciated.

    Private Sub cmdConvert_Click(sender As Object, e As EventArgs) Handles cmdConvert.Click

        Dim AcroXApp As Acrobat.AcroApp

        Dim AcroXAVDoc As Acrobat.AcroAVDoc

        Dim AcroXPDPage As Acrobat.AcroPDPage

        Dim AcroXPDDoc As Acrobat.AcroPDDoc

        Dim JSO As Object

        AcroXApp = CreateObject("AcroExch.App")

        AcroXApp.Hide()

        AcroXAVDoc = CreateObject("AcroExch.AVDoc")

        AcroXAVDoc.Open(txtTargetFile.Text, "")

        AcroXPDDoc = AcroXAVDoc.GetPDDoc

        JSO = AcroXPDDoc.GetJSObject

        Dim iPageCount = AcroXPDDoc.GetNumPages

        For i = 0 To iPageCount - 1

            Dim rotation = JSO.getPageRotation(i)

            Select Case rotation

                Case 90

                    AcroXPDPage = AcroXPDDoc.AcquirePage(i)

                    Debug.Print("Page " & i & " was set at " & rotation & " degree rotation")

                    AcroXPDPage.SetRotate(0)

                Case 180

                    AcroXPDPage = AcroXPDDoc.AcquirePage(i)

                    Debug.Print("Page " & i & " was set at " & rotation & " degree rotation")

                    AcroXPDPage.SetRotate(0)

                Case 270

                    AcroXPDPage = AcroXPDDoc.AcquirePage(i)

                    Debug.Print("Page " & i & " was set at " & rotation & " degree rotation")

                    AcroXPDPage.SetRotate(0)

            End Select

        Next

        Dim strOutFileName As String = Replace(txtTargetFile.Text, ".pdf", "_Rotated.pdf")

        JSO.SaveAs(strOutFileName)

        AcroXAVDoc.Close(False)

        AcroXApp.Exit()

        AcroXApp = Nothing

        AcroXAVDoc = Nothing

        AcroXPDDoc = Nothing

        JSO = Nothing

    End Sub

[#3]

You can’t.

The .NET APIs don’t have access to content.

[#4]

Using wild guesswork you might use the JavaScript getPageNthWord and getPageNthWordQuads to pick likely candidates. A sufficiently long string that is taller than it is wide is suggestive. Deriving the parameters for guesswork will be an interesting exercise.

[#5]

The below code allows me to identify the vertical text:

        For i = 0 To iPageCount - 1

            AcroXPDPage = AcroXPDDoc.AcquirePage(i)
            iNumWordsOnPage = JSO.getPageNumWords(i)

            For j = 0 To iNumWordsOnPage - 1
                strCurrentWord = JSO.getPageNthWord(i, j)

                Dim Array() As Object
                Array = JSO.getPageNthWordQuads(i, j)

                Dim itemFromArray As Object
                itemFromArray = Array(0)

                Dim coord1 As Double
                Dim coord2 As Double
                Dim coord3 As Double
                Dim coord4 As Double

                coord1 = itemFromArray(0)
                coord2 = itemFromArray(1)
                coord3 = itemFromArray(2)
                coord4 = itemFromArray(3)

                If coord2 <> coord4 Then
                    MsgBox("Vertical Text = " & strCurrentWord)
                End If

            Next

        Next