In the non-mode dialog box, use acedcommand () to return error-5001.

When acedcommand () is used in the non-mode dialog box, error-5001 is returned. The ObjectARX document describes the following:

Code differences under the application execution Context

In the case of modeless dialogs and external process-generated ActiveX requests, the Code must lock the statements, including the current document. the use of the iacaddocument Methods startundomarker () and endundomarker () will apply a kwritelock to the document.

Solution: Use sendmessage () or sendstringtoexecute () instead of acedcommand.
Cstring strcmd;
Strcmd. Format ("UCS/nm/NZ/n % F/N", Z );
For (INT I = 0; I <strcmd. getlength (); I ++ ){
: Sendmessage (acedgetacadtextcmdline ()-> m_hwnd, wm_char, strcmd [I], 1l );
}