ON_COMMAND_RANGE can be used to map a contiguous range of command IDs to a single message handler function.
ON_COMMAND_RANGE (id1, id2, memberFxn)
- id1 - Command ID at the beginning of a contiguous range of command IDs.
- id2 - Command ID at the end of a contiguous range of command IDs.
- memberFxn - The name of the message-handler function to which the commands are mapped.
ON_CONTROL_RANGE macro to map a contiguous range of control IDs to a single message handler function for a specified Windows notification message,
ON_CONTROL_RANGE(wNotifyCode, id1, id2, memberFxn )
- wNotifyCode - The notification code to which your handler is responding.
- id1 - Command ID at the beginning of a contiguous range of control IDs.
- id2 - Command ID at the end of a contiguous range of control IDs.
- memberFxn - The name of the message-handler function to which the controls are mapped.
The range of IDs starts with id1 and ends with id2. The handler is called for the specified notification coming from any of the mapped controls. There is no automatic support for message map ranges, so you must place the macro yourself.
Here is a demo app to show the utility of ON_COMMAND_RANGE(). We are showing a menu based app used for drawing verious shapes. We have taken a range of menu IDs to map to asingle drawing function. We decode the drawing function using the argument ID passed to the command function. We are displaying which id is called with the help of message box.
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