C# COM Escaping current command

[Anonymous]

Is it possible to have a line of code that interrupts the current command in AutoCAD, like the equivalent of pressing 'escape' on the keyboard?

For example, if during runtime the user has clicked somewhere on the screen in AutoCAD and is currently creating a selection window, I would like to cancel that command and continue with my code.

[Ed__Jobe]

You don't need code. Just start your command macro in the cui with "^C^CmyCommand". That will issue two {ESC} before starting myCommand.

[Anonymous]

What I'm using isn't a command macro, it's an out of process program that requires the user to select a point in AutoCAD before returning to my program, but the COM calls break if it's in the middle of a selection. 

Just wondering if there was a way to get rid of that selection programmatically before continuing and avoid relying on the user to cancel their selection.

[Ed__Jobe]

You can mimic the macro in my first post using the vba SendKeys method. See the vba Help on how to use it.

[Anonymous]

If I try to do the SendCommand method while it's in the middle of a command e.g. selecting, I get the exception "Call was rejected by callee. (Exception from HRESULT: 0x80010001 (RPC_E_CALL_REJECTED)", any idea how to get around this?

[Ed__Jobe · Accepted solution]

I said use SendKeys, not SendCommand. In C# it should be under System.Windows.Forms.SendKeys. You just need to make sure you have the right window to send the keys to. It needs to be the acad application window.