BITMAP This style causes the check box to be drawn with a bitmap instead of its normal appearance. See Chapter 3, section 3.8 for a complete description.
FRAMED This style is used only with bitmap buttons. It requests that a thin frame be drawn around the button. Typically this appears as a thin black line. Not all systems support frames, in which case the request is ignored. By default, buttons are framed under Windows NT/Windows 2000.
UNFRAMED This style is used only with bitmap buttons. It requests that the button be drawn without a frame. Not all systems support unframed buttons, in which case the request is ignored. By default, buttons are not framed under Windows 95/98.
SQUARE This style is used only with framed bitmap buttons. It forces the button to have square corners. Without this style, the button will have slightly rounded corners.
SELF-ACT This style creates a self-activating check box. A SELF-ACT check box behaves in the same way as a SELF-ACT push button (see the Push-Button section above for details). Self-activating check boxes return control to the previously active control or window when they are clicked. Typically, you will want to use the NOTIFY style (below) in conjunction with SELF-ACT, so that your program is informed whenever the check box is clicked.
NOTIFY This style tells the runtime to generate a CMD-CLICKED event whenever the value of the check box is changed by the user. This allows your program to respond immediately to the change. In essence, the check box acts like a combination check box and push button. Without the NOTIFY style, the check box remains active after it has been changed (exception: see SELF-ACT above).
LEFT-TEXT Check boxes with this style display their text to the left of the box instead of to the right. Note that if you use this style and try to vertically align several check boxes, the boxes may not align vertically. This is because the default behavior of the runtime is to place the right edge of the check box at the minimum distance needed from its left edge to accommodate the control's text. This results in the boxes being placed in different columns depending on the text of each control. Supplying a uniform width using the SIZE property overrides this behavior. (create, modify)
FLAT This style is used only with bitmap buttons. It creates a check box without visible borders on Windows systems. On non-Windows systems, this style has no effect.