Platform : Windows 9X, XP, Vista, Window 7, Window 8
For Windows Developers who need to PDF Fax Viewer and Image Viewer , plus support TIFF with WANG Annotations, securing a PDF document, add annotation with PDF in c++ , c#, vb.net , vb, delphi, vfp, ms access.
Step 1: Download trial version of Image Viewer cp Gold ActiveX and installed it.
Step 2: Create New Visual Basic Project, select Windows Application.
Step 3: Add a buttons into the form.
Step 4: Add following code in buttons click event.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim iResult as Integer
AxImageViewer1.OCRCharFilter = ""
AxImageViewer1.OCRSetRect(0, 0, 0, 0)
iResult =AxImageViewer1.OCR2SearchableMultipagePDF("c:\test1.pdf", 0, "dictfiles")
If iResult = -3 Then
MessageBox.Show("Please select image first")
If iResult <> 1 Then
MessageBox.Show("Start OCR Failed")
MessageBox.Show("Save to c:\test1.pdf completed")
A searchable PDF is simply a PDF with multiple layers. The top layer is the original image as it was scanned in. Under that layer is a layer of text accurately positioned so that each word is directly behind the pixels that represent the word
A searchable PDF has following benefits:
1. You can select the text, copy it to the clipboard, and then paste into a metadata collection form.
2. You can highlight search hits.
3. Search engines will be able to index the PDF and return it later as a search result.