A 4D Write Pro document can be exported to a text variable using the WP EXPORT VARIABLE command as demonstrated in following code:

C_TEXT(exportedWriteDoc) C_OBJECT(writeProArea) WP EXPORT VARIABLE(writeProArea;exportedWriteDoc;wk web page html 4D)

The text variable exportedWriteDoc can then be saved to a text field in your database.

Then, at a later time, the exportedWriteDoc data can be loaded back into a 4D Write Pro area using the WP NEW command like this:

C_TEXT(exportedWriteDoc) C_OBJECT(writeProArea) writeProArea:=WP NEW(exportedWriteDoc)

The WP EXPORT DOCUMENT command also exists but is more suited for saving the document to disk because it wants a filepath for the blob, not a blob field. So it would take a few extra steps to get it into a field.