This section contains information about the programming elements used with up-down controls.
Overviews
| Topic |
Contents |
| Up-Down Controls |
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 (called a buddy window).
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Functions
| Topic |
Contents |
| CreateUpDownControl |
Creates an up-down control. Note: This function is obsolete. It is a 16 bit function and cannot handle 32 bit values for range and position.
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Messages
| Topic |
Contents |
| UDM_GETACCEL |
Retrieves acceleration information for an up-down control.
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| UDM_GETBASE |
Retrieves the current radix base (that is, either base 10 or 16) for an up-down control.
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| UDM_GETBUDDY |
Retrieves the handle to the current buddy window.
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| UDM_GETPOS |
Retrieves the current position of an up-down control with 16-bit precision.
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| UDM_GETPOS32 |
Returns the 32-bit position of an up-down control.
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| UDM_GETRANGE |
Retrieves the minimum and maximum positions (range) for an up-down control.
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| UDM_GETRANGE32 |
Retrieves the 32-bit range of an up-down control.
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| UDM_GETUNICODEFORMAT |
Retrieves the Unicode character format flag for the control.
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| UDM_SETACCEL |
Sets the acceleration for an up-down control.
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| UDM_SETBASE |
Sets the radix base for an up-down control. The base value determines whether the buddy window displays numbers in decimal or hexadecimal digits. Hexadecimal numbers are always unsigned, and decimal numbers are signed.
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| UDM_SETBUDDY |
Sets the buddy window for an up-down control.
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| UDM_SETPOS |
Sets the current position for an up-down control with 16-bit precision.
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| UDM_SETPOS32 |
Sets the position of an up-down control with 32-bit precision.
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| UDM_SETRANGE |
Sets the minimum and maximum positions (range) for an up-down control.
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| UDM_SETRANGE32 |
Sets the 32-bit range of an up-down control.
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| UDM_SETUNICODEFORMAT |
Sets the Unicode character format flag for the control. This message allows you to change the character set used by the control at run time rather than having to re-create the control.
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Notifications
| Topic |
Contents |
| NM_RELEASEDCAPTURE (up-down) |
Notifies an up-down control's parent window that the control is releasing mouse capture. This notification is sent in the form of a WM_NOTIFY message.
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| UDN_DELTAPOS |
Sent by the operating system to the parent window of an up-down control when the position of the control is about to change. This happens when the user requests a change in the value by pressing the control's up or down arrow. The UDN_DELTAPOS message is sent in the form of a WM_NOTIFY message.
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Structures
| Topic |
Contents |
| NMUPDOWN |
Contains information specific to up-down control notification messages. It is identical to and replaces the NM_UPDOWN structure.
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| UDACCEL |
Contains acceleration information for an up-down control.
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Constants