Didn't found OCR-Dll

[iirusger]

I have a project of an AddOn for a main application, wich call a .Net-Dll with the GdPicture functions twain-scan, display and maniplulate a picture
and give it back to the main application as searchable Pdf. So OCR is needet.

Call GdPicture and all his functions is possible under XP , somtimes unter Vista and never under Windows7,
there an error was displayed as statusreturncode: didn't found the GdPicture.NET.ocr.tesseract.dll.

I know, if it lie in the main application directory or unter windows or windows\system32 it would be found.
But for me it is forbidden to save it at this places.

I have to save it in my AddOn directory.
This Dll is placed there together with the other GdPicture-Dlls and the GdPicture.Net.Dll (version 6.4) is registered there.

How find the GdPicture-Dll itself the OCR-Dll?
Is there a variable wich can be read/write for the place of the DLL?
If there a way to say my application where the OCR-Dll is? Unfortunately I don't call it myself.

I need this informations to create a setup for my AddOn.

[Loïc]

Hi,

The dll must be placed into the same directory of your application or within a directory defined into the "PATH" environment variable.

With best regards,

Loïc

[iirusger]

...The dll must be placed into the same directory of your application or within a directory defined into the "PATH" environment variable...

For me it is forbidden to write values in the central windows system and to place my DLL in the application path too.

Because i found an other way to say at the runtime where my DLL is locateted in an external but shared DLL-Path:
in C# I wrote:
// remember where my registered DLL is wich i even started
private string _assemblyDir = new System.IO.FileInfo(System.Reflection.Assembly.GetExecutingAssembly().Location).DirectoryName.ToString();
// call the Kernel32.dll to use the SetDllDirectory command
[DllImport("Kernel32",CharSet=CharSet.Unicode)]
public extern static bool SetDllDirectory(string _assemblyDir);
// set the searchpath and get the returncode = true if all done right
bool returncode = SetDllDirectory(_assemblyDir);

however, it works. For more information you can read at http://msdn.microsoft.com/en-us/library ... 85%29.aspx

Loïc, you are right,
there are more Path variables than for system and user ! I learned it now.
the unknown before for me is this for the application envirement.
so I wrote a other code for various places of DLLs to find all:
in C# I wrote:
// remember where my registered DLL is, wich i even started
private string _assemblyDir = new System.IO.FileInfo(System.Reflection.Assembly.GetExecutingAssembly().Location).DirectoryName.ToString();
// read the old content
string ePath = Environment.GetEnvironmentVariable("Path");
// check if the needed path already in the content
if (ePath.IndexOf(_assemblyDir)==-1) {
// add the Path to the content if not already in it
Environment.SetEnvironmentVariable("Path", ePath + ";" + _assemblyDir); }

regards iirusger

[Loïc]

Thank you so much for this update.

Your information will be at least, very useful for my developments

Loïc