Upon receiving this message, the value set redraws the control with the new width, height, and spacing specifications for each item. Any items that do not fit within the current window size are clipped.

When the value set control receives a WM_SIZE (in Value Set Controls) message, which is sent when the value set window is resized, the value set control defaults the size of each item by dynamically dividing the window size by the number of rows and columns. It allows enough room for the border, selection cursor, and selection emphasis, and defaults the spacing between items to 0. To override these default settings, the application must resend the VM_SETMETRICS message.