ActiveX: How to post a path?

Hi, I've started using the ActiveX interface to communicate with Autodesk AutoCAD (version 2016). Therefore I use the invoke command. This works pretty fine as it comes to execute basic commands (both create circle (1) & (2)) but I haven't found a solution on how I can post paths along with invoke. I am trying to attach an image to a drawing therefore I call the -ATTACH command. A backspace usually ends an entry as in the following example after the -ATTACH command.

acad=actxGetRunningServer('AutoCAD.Application'); % get the instance of AutoCAD which is running priorly

documents.Add %create a new drawing

c_doc=get(acad,'ActiveDocument');   % current document instance

% both of the following commands do work:
invoke(c_doc,'PostCommand','_Circle 2,2,0 4 '); %create circle(1)
invoke(c_doc,'PostCommand','_Circle vbCr 2,2,0 vbCr 4 vbCr') %create circle(2)

% However, this command is not posted to ACAD correctly:
invoke(c_doc,'PostCommand','-ATTACH C:\users\me\myimage.jpg  0,0 490 0 '); %-ATTACH Path Insertpoint Scale angle

But this doesn´t work after the specified path, all entries are recognized as part of the path, commonly used commands from VBA (vbCr, &vbCr,...) also don´t work or I just haven´t found the right one, yet. Does someone have a solution for this?

Thanks very much!

[Guillaume]

Two notes:

• this has nothing to do with activex (or matlab). The problem is with the format of the text that your autocad function expect. At a push, your question is about inserting control characters in a char array.
• In all likelyhood you don't need to use invoke or get. The following code would probably work:

acad = actxGetRunningServer('AutoCAD.Application');
documents.Add;   %Looks like you're missing a line: documents = acad.Documents
c_doc = acad.ActiveDocument;
c_doc.PostCommand('_Circle 2,2,0 4 ');
c_doc.PostCommand('_Circle vbCr 2,2,0 vbCr 4 vbCr');
c_doc,'PostCommand(sprintf('-ATTACH C:\users\me\myimage.jpg\r\r0,0 490 0 '));

And if the Add method of the Documents collection of autocad is properly designed,

c_doc = documents.Add;

would be more reliable than going through ActiveDocument.

Answer 1

[BA]

Solution is simple but took me some time:

Use sprinf to create a char which can understand the \r method:

sprintf('Some String\rSome Other String');

In this case are two \r required to 'hit' the <enter>button two times:

MyCommand=sprintf('-ATTACH C:\users\me\myimage.jpg\r\r0,0 490 0 ');
invoke(c_doc,'PostCommand',MyCommand);

Hope this will help others in the future!

[Stephen23]

You will probably need to escape those backslashes:

sprintf('-ATTACH C:\\users\\me\\myimage.jpg\r\r...')

or alternatively supply it as an input:

sprintf('-ATTACH %s\r\r..:','C:\users\me\myimage.jpg')