SBM_ENABLE_ARROWS Overview  Group

An application sends the SBM_ENABLE_ARROWS message to enable or disable one or both arrows of a scroll bar control.

SBM_ENABLE_ARROWS 

wParam = (WPARAM) fuArrowFlags; // scroll-bar arrow flags 

lParam = 0;                     // not used; must be zero 

 

Parameters

fuArrowFlags

Specifies whether the scroll bar arrows are enabled or disabled and indicates which arrows are enabled or disabled. This parameter can be one of the following values:

Value	Meaning
ESB_DISABLE_BOTH	Disables both arrows on a scroll bar.
ESB_DISABLE_DOWN	Disables the down arrow on a vertical scroll bar.
ESB_DISABLE_LTUP	Disables the left arrow on a horizontal scroll bar or the up arrow on a vertical scroll bar.
ESB_DISABLE_LEFT	Disables the left arrow on a horizontal scroll bar.
ESB_DISABLE_RTDN	Disables the right arrow on a horizontal scroll bar or the down arrow on a vertical scroll bar.
ESB_DISABLE_UP	Disables the up arrow on a vertical scroll bar.
ESB_ENABLE_BOTH	Enables both arrows on a scroll bar.

Return Values

If the message succeeds, the return value is TRUE; otherwise, it is FALSE.