MTM_ExpandRow

This message is sent to expand a row.

Parameters
wParam
Optional flags:

MTER_REDRAW	Redraws the table
MTER_RECURSIVE	Expands all levels
MTER_BY_USER	The user expands the row through a mouse or keybord action

lParam
Number of the row to expand

Return
Return MTBL_NODEFAULTACTION to prevent row expanding

Remarks
M!Table sends this message in the following cases:

The user clicks into the node of a row that has the flag MTBL_ROW_CANEXPAND
The user double clicks a row that has the flag MTBL_ROW_CANEXPAND and the table flag MTBL_FLAG_EXPAND_ROW_ON_DBLCLK is set
The user presses [+] or [*] ( expands all levels ) when the focus row has the flag MTBL_ROW_CANEXPAND
A call to MTblExpandRow