Attaching Database OLEDB in MDL-Code

Hi Everyone,

I am trying to write an MDL that creates and attaches certain Attributes to new created graphic Elements into an Access MDB-Database. Therefore I want to make sure, before the creation of new Elements starts, that the correct Database is attached. To have an overview, that the correct MDB is attached to the DGN-file there are the following 3 files with same Name created, before the MDL starts:

- <filename>.dgn  (DGN-file)

- <filename>.mdb  (Access MDB-Database)

- <filename>.udl  (Universal-Data-Link-file)

Here is a part of the Code, that should do this:

int attachDatabaseUDL
(
void
)
  {
	char dgnDevice[MAXFILENAMELENGTH]="\0";	// DGN-Device
	char dgnPath[MAXFILENAMELENGTH]="\0";	// DGN-Path
	char dgnName[MAXFILENAMELENGTH]="\0";	// DGN-Name (WITHOUT Suffix!)
	char udl_file[MAXFILENAMELENGTH]="\0";	// UDL-Filename
	int ret=0;								// Return-Value

	// Reading Name-parts of actual Design-File
	mdlFile_parseName (tcb->dgnfilenm, dgnDevice, dgnPath, dgnName, NULL);

    // Creation of UDL-Name
    strcpy (udl_file, dgnDevice);
	strcat (udl_file, ":");
	strcat (udl_file, dgnPath);
    strcat (udl_file, dgnName);
    strcat (udl_file, ".udl\0");

    // Attaching Database by use of UDLl-file
	ret=mdlDB_activeDatabase(udl_file);

    // Information about Success
    if (ret==SUCCESS) mdlOutput_status ("DB attached");
	else mdlOutput_status ("ERROR! DB NOT attached!");

	return ret;

  }

When I call this function the first time I opened the DGN-file I get an error-message

"Datenbank-Server nicht aktiv" (= Database-Server is not active)

The same happens if I key-in "DB=<full Path>\<filename>.udl" the first time. If I choose via menu "Create Database-Connection" another udl-file, detach the database afterwards and call this function again (or repeat the mentioned key-in), than it works.

So my question is, with which function can make the database-server active, so that the function works, or is there any other reason for this behaviour?

Many thanks for your help,

Ines Wieland