MFC - Spin Button


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A Spin Button Control (also known as an up-down control) is a pair of arrow buttons that the user can click to increment or decrement a value, such as a scroll position or a number displayed in a companion control. it is represented by CSpinButtonCtrl class.

Here is the list of methods in CSpinButtonCtrl class −

Sr.No. Name & Description
1

Create

Creates a spin button control and attaches it to a CSpinButtonCtrl object.

2

CreateEx

Creates a spin button control with the specified Windows extended styles and attaches it to a CSpinButtonCtrl object.

3

GetAccel

Retrieves acceleration information for a spin button control.

4

GetBase

Retrieves the current base for a spin button control.

5

GetBuddy

Retrieves a pointer to the current buddy window.

6

GetPos

Retrieves the current position of a spin button control.

7

GetRange

Retrieves the upper and lower limits (range) for a spin button control.

8

SetAccel

Sets the acceleration for a spin button control.

9

SetBase

Sets the base for a spin button control.

10

SetBuddy

Sets the buddy window for a spin button control.

11

SetPos

Sets the current position for the control.

12

SetRange

Sets the upper and lower limits (range) for a spin button control.

Here is the list of messages mapping for Spin Button control.

Message Map entry Description
BN_CLICKED ON_BN_CLICKED( <id>, <memberFxn> ) The framework calls this member function when is button clicked.
BN_DISABLE ON_BN_DISABLE( <id>, <memberFxn> ) The framework calls this member function when button is disabled.
BN_DOUBLECLICKED ON_BN_DOUBLECLICKED( <id>, <memberFxn> ) The framework calls this member function when button is double clicked.
BN_PAINT ON_BN_PAINT( <id>, <memberFxn> ) The framework calls this member function when an application makes a request to repaint a button.

Let us look into a simple example of Spin button by creating a new MFC dialog based application.

Step 1 − Add one Spin Control and one Edit control from the Toolbox.

Spin Button

Step 2 − Go to the Properties of Spin Control and set the values of Auto Buddy and Set Buddy Integer to True.

mfc_windows_controls.htm
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