Sets the current block format tag.
Command FormatBlock User interface None. Set bUserInterface to false. execCommand vValue Required. String that specifies a valid block format tag. Applies to execCommand, queryCommandEnabled, queryCommandIndeterm, queryCommandState, queryCommandSupported, queryCommandValue.
The available block formatting strings may change in subsequent releases of the MSHTML component. Call IOleCommandTarget::Exec with the IDM_GETBLOCKFMTS Command ID to obtain the current list of available block formatting commands that can be passed with the FormatBlock Command ID.
Internet Explorer 4.0 and later.