Do you want to make a button that users can click? If you are asking for a db command this does this, there are none. You have to make your own.
// lets use sprite #1 as the image of the button
int mx = dbMouseX(),
my = dbMouseY(),
width = dbSpriteWidth(1),
height = dbSpriteHeight(1),
sx = dbSpriteX(1),
sy = dbSpriteY(1);
if(mx > sx && mx < sx + width && my > sy && my < sy + height) // If mouse is over sprite
if(dbMouseClick() == 1) // If left click
// 'Button' has been clicked
Your_Health = (My_Mood == HAPPY) ? 100 : NULL;