After a few problems I create a form in wich a User can create new and edit old word documents, saveing them in GENERAL field.
With VB for application I create a DataSource (Word Document) each time the user want to edit the main document.
The first time all is OK, but after that the DataSource is linked to the (Document 1) not to My document. What I'm doing wrong. Here is the code:

// Dogowor is OleBoundControl that is linked to the GENERAL field where I keep the documents

m_name = "c:\temp\Src_Doc"
IF FILE(m_name+".DOC")
mm_name = m_name + ".DOC"
DELETE FILE &mm_name
ENDIF

header_rec = "Field1;Field2;Field3"

LOCAL oWord
oWord = ThisForm.Dogowor.object
WITH oWord
WITH .MailMerge
.CreateDataSource(m_name,"","",header_rec,,"","","",.t.)
.EditDataSource
WITH .Application
.Selection.TypeText("test1")
.Selection.MoveRight(12) && One cell
.Selection.TypeText("Test2")
ENDWITH
ENDWITH
ENDWITH
thisForm.Dogowor.DoVerb(-2)