static MyTextDrawOpen[MAX_PLAYERS];
static AllowMyTextDrawClose[MAX_PLAYERS];

public OnPlayerClickTextDraw(playerid, Text:clickedid)
{
    if(clickedid == INVALID_TEXT_DRAW)
    {
        // Action to perform on this textdraw when closing
        if(MyTextDrawOpen[playerid])
        {
            // Textdraws allowed to close
            if(AllowMyTextDrawClose[playerid]) MyTextDrawOpen[playerid] = false;

            // Textdraws not allowed to close yet
            else SelectTextDraw(playerid, 0x00FF00FF);
        }
    }
    return 1;
}