Want to quickly learn? This fast application programming interfaces of ByteScout PDF Suite for VB.NET plus the guidelines and the code below will help you quickly learn how to draw with transparency in pdf with pdf sdk. IF you want to implement the functionality, just copy and paste this code for VB.NET below into your code editor with your app, compile and run your application. Complete and detailed tutorials and documentation are available along with installed ByteScout PDF Suite if you’d like to learn more about the topic and the details of the API.
ByteScout PDF Suite free trial version is available on our website. VB.NET and other programming languages are supported.
Imports Bytescout.PDF ''' <summary> ''' This example demonstrates how to draw transparent objects. ''' </summary> Class Program Shared Sub Main() ' Create new document Dim pdfDocument = New Document() pdfDocument.RegistrationName = "demo" pdfDocument.RegistrationKey = "demo" ' Add page Dim page = New Page(PaperFormat.A4) pdfDocument.Pages.Add(page) Dim canvas = page.Canvas ' Prepare pens and brushes Dim borderPen = New SolidPen(New ColorRGB(0, 0, 0), 2.0F) Dim brush1 = New SolidBrush(New ColorRGB(255, 0, 0)) Dim brush2 = New SolidBrush(New ColorRGB(0, 0, 255)) borderPen.Opacity = 50 brush1.Opacity = 30 brush2.Opacity = 60 ' Draw normal rectangles canvas.DrawRectangle(brush1, 100, 100, 100, 100) canvas.DrawRectangle(borderPen, brush2, 150, 150, 100, 100) borderPen.Opacity = 80 brush1.Opacity = 60 brush2.Opacity = 30 ' Draw rounded rectangles canvas.DrawRoundedRectangle(brush1, 220, 100, 100, 100, 10) canvas.DrawRoundedRectangle(borderPen, brush2, 270, 150, 100, 100, 10) ' Save document to file pdfDocument.Save("result.pdf") ' Cleanup pdfDocument.Dispose() ' Open document in default PDF viewer app Process.Start("result.pdf") End Sub End Class