ActiveX license

[wriedmann]

Hi Robert, hi Chris,

I have a ActiveX control that is used with a license key in VO, with

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<oOLEControl>:CreateEmbedding(<cProgID>, [<cLicKey>]) ---> lSuccess

When moving that control to X# I have followed the recipes from the samples, but this one needs the license key passed as second parameter to CreateEmbedding in VO.
How can I pass that license string to my control object in X#?
Thank you very much!
Wolfgang

[robert]

Wolfgang,
Usually if you add an activeX to a windows form then a file Licenses.Licx will be added to your project. This will be included as resource in your project. And the ActiveX control will also persist its state including the license information in the form.resx file.
So you don't have to specify the key..
If that does not work then this is the code (in C#) that retrieves the private property of the AxHost (the host of the ActiveX control) and sets the key:

System.Reflection.FieldInfo f =
typeof(AxHost).GetField("licenseKey",
System.Reflection.BindingFlags.NonPublic |
System.Reflection.BindingFlags.Instance);
f.SetValue(oActiveXControl, "license-here");


Robert

[wriedmann]

Hi Robert,

thank you very much!

Now I have encountered another issue, I need to put all things together and let you know.

Wolfgang

[wriedmann]

Hi Robert,
we were able to make this OCX work in a C# application, and it used a lot of code to make the OCX work:

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System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(Form1));
this.axEasyView1 = new AxEasyViewLib.AxEasyView();
((System.ComponentModel.ISupportInitialize)(this.axEasyView1)).BeginInit();
this.axEasyView1.Enabled = true;
this.axEasyView1.Location = new System.Drawing.Point(0, 0);
this.axEasyView1.Name = "axEasyView1";
this.axEasyView1.OcxState = ((System.Windows.Forms.AxHost.State)(resources.GetObject("axEasyView1.OcxState")));
this.axEasyView1.Size = new System.Drawing.Size(796, 455);
this.axEasyView1.TabIndex = 0;
this.Controls.Add(this.axEasyView1);
((System.ComponentModel.ISupportInitialize)(this.axEasyView1)).EndInit();

Unfortunately, copying this code to my (written) class it throws an exception of type

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System.Windows.Forms.AxHost+InvalidActiveXStateException

Do you have any idea where I can search? Is this in any manner combined to the license issue?

Wolfgang

[robert]

Wolfgang,
You're most likely missing the axEasyView1.OcxState in the Resx file from the form.
Robert

[wriedmann]

Hi Robert,
yes, I think so. But hopefully I have a chance to do without it because in the migrated VO application there is no painted WinForms form.
Wolfgang