Prrrrrleeeeaaaaseeee?????

[Cableguy]

Erel, Could you please post a sample wrapper source-code?

 

[agraham]

Hi Cableguy. What do you want that is different ,or in addition, to the Scroll Bar example that Erel has already posted?

 

[Cableguy]

the scrool bar uses known namespaces and therefore are (now) straight foward to implement..
I just can figure out how to "call" an outside dll and "refer" to it to build a wrapper...

 

[Erel]

What do you want to wrap?
There are two kinds of things you can wrap, one is a native dll and the other is a .Net dll.

 

[Cableguy]

I "wish" to wrapp the two libraries I found and posted inthe "wishList" forum!!

Maybe head over feet but Im willing....

 

[Erel]

The GemBox component is a .Net component.
You should try adding the dll to Basic4ppc directly.
If the dll includes methods not supported by Basic4ppc you should create a .Net project, add a reference to this dll and create the required methods and properties.
It will only work on the desktop as this is not a .Net CF dll.

 

[agraham]

You declare the entry points in the non.NET dll as follows

    // for C#
    [DllImport("User32.dll")]
    public static extern int MessageBox(int h, string m, string c, int type);

    ' for VB
Declare Auto Function MBox Lib "user32.dll" Alias "MessageBox" ( _
    ByVal hWnd As Integer, _
    ByVal txt As String, _
    ByVal caption As String, _
    ByVal Typ As Integer) _
    As Integer

    ' also for VB
  <DllImport("User32.dll")>
Public Shared Function MBox Lib "user32.dll" Alias "MessageBox" ( _
    ByVal hWnd As Integer, _
    ByVal txt As String, _
    ByVal caption As String, _
    ByVal Typ As Integer) _
    As Integer

Then use them as normal methods, a bit of documentation from VS 2005 attached.

EDIT: Open the doc in Wordpad - despite telling it to save it as txt it seems to be rtf!

 

[dzt]

Hi all,

1. Access to native DLLs (native DLL is a DLL compiled to machine code) can't be accieved from B4PPC directly (now and in the future).

The reason is that there is no way to do that trough C# (The .NET language behind B4PPC) at runtime. And C# runtime (I repeat, runtime not design time) limits are the upper limits of B4PPC by it's nature.

Therefor a NET wrapper is always needed.

2. Access to .NET DLLs theoritically could be done trough B4PPC directly (without a wrapper) if B4PPC could have support for every data type supported by C#.NET. For now B4PPC have serious limitations on this.

So a wrapper is needed to convert complex .NET data types to well known B4PPC data types.

 

[dzt]

the scrool bar uses known namespaces and therefore are (now) straight foward to implement..
I just can figure out how to "call" an outside dll and "refer" to it to build a wrapper...

To refer to a .NET DLL from SharpDevelop to "Projects" panel, right click "references", click ".NET Assembly Browser" tab, click "Browse" button and select your .NET DLL.

Now its elements are accessible from your code.

 

[Erel]

2. Access to .NET DLLs theoritically could be done trough B4PPC directly (without a wrapper) if B4PPC could have support for every data type supported by C#.NET. For now B4PPC have serious limitations on this.

It is more accurately to say that Basic4ppc doesn't support custom data types. It does support all primitive data types (including Object data type).

 

[agraham]

The reason is that there is no way to do that trough C# (The .NET language behind B4PPC) at runtime.

Not strictly true. You can use an unmanaged DLL to help out!

http://www.codeproject.com/csharp/dyninvok.asp


http://www.developerfusion.co.uk/show/4451/2/

 

[dzt]

Not strictly true. You can use an unmanaged DLL to help out!

http://www.codeproject.com/csharp/dyninvok.asp


http://www.developerfusion.co.uk/show/4451/2/

I have had in the past a lot of work in dynamically invoking functions inside native DLLs so I'm aware of these two methods (x86 assembly and C++ code (!!!) not C#).

But what about Compact Framework?

Is there a simple working example for Windows Mobile?

 

[dzt]

It is more accurately to say that Basic4ppc doesn't support custom data types. It does support all primitive data types (including Object data type).

I must agree that the above is more accurate

 

[Cableguy]

The GemBox component is a .Net component.
You should try adding the dll to Basic4ppc directly.
If the dll includes methods not supported by Basic4ppc you should create a .Net project, add a reference to this dll and create the required methods and properties.
It will only work on the desktop as this is not a .Net CF dll.

I tryed it already and it does add a lot of object but error because there's a few objects bettween classes that are named the same....
Also none of the available objects seem to be "callable"....