DLL failing to unlock in new application

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Hey everyone, 
I'm having difficulty transferring my .dll file to a new program. It will unlock and do what I want in my existing application but when I take those .vb and .dll files and import them into a new project, it fails to unlock and does not have an error code. Here's the code I'm using, it consistently returns unlockkey of 0 and lasterrorcode of 0:
Imports Programname.QuickPDFDLL0725

Public Class PDFBuilder

    Public QPD As PDFLibrary

Public Sub New()
        Try

            Dim PDF_LIBRARY_PATH As String = Application.StartupPath & "\objects\" & "QuickPDFDLL0725.dll"

            Const PDF_LIC_KEY As String = "licensekey"

            QPD = New PDFLibrary(PDF_LIBRARY_PATH)

            Dim unlocked_flag As Integer = QPD.UnlockKey(PDF_LIC_KEY)

            MsgBox(unlocked_flag)

        Catch ex As Exception

            MsgBox(ex.ToString)
        End Try

    End Sub

End Class

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sdumont Members Profile Find Members Posts Beginner Joined: 29 Nov 18 Location: Buffalo, NY, US Status: Offline Points: 7	Post Options Post Reply Quote sdumont Report Post Thanks(0) Quote Reply Topic: DLL failing to unlock in new application Posted: 10 Dec 18 at 6:52PM
	Hey everyone, I'm having difficulty transferring my .dll file to a new program. It will unlock and do what I want in my existing application but when I take those .vb and .dll files and import them into a new project, it fails to unlock and does not have an error code. Here's the code I'm using, it consistently returns unlockkey of 0 and lasterrorcode of 0: Imports Programname.QuickPDFDLL0725 Public Class PDFBuilder Public QPD As PDFLibrary Public Sub New() Try Dim PDF_LIBRARY_PATH As String = Application.StartupPath & "\objects\" & "QuickPDFDLL0725.dll" Const PDF_LIC_KEY As String = "licensekey" QPD = New PDFLibrary(PDF_LIBRARY_PATH) Dim unlocked_flag As Integer = QPD.UnlockKey(PDF_LIC_KEY) MsgBox(unlocked_flag) Catch ex As Exception MsgBox(ex.ToString) End Try End Sub End Class

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3524	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 11 Dec 18 at 9:25AM
	does the new project/app find the QuickPDF.dll? How are your new compile settings? These old QuickPDF.dll is a 32-bit-dll - please keep this in mind. What type of system you're using for the new project... 32- or 64 bit?
	Cheers, Ingo

sdumont Members Profile Find Members Posts Beginner Joined: 29 Nov 18 Location: Buffalo, NY, US Status: Offline Points: 7	Post Options Post Reply Quote sdumont Report Post Thanks(0) Quote Reply Posted: 21 Dec 18 at 8:03PM
	Thanks again for your help Ingo, the problem was indeed related to the type of CPU I was compiling for. After changing it over to x86 in Visual Studio it works now!