This topic pertains only to application development in C and C++. See DirectInput Visual Basic Samples.

Description

The Scrawl application demonstrates use of the mouse in exclusive mode in a windowed application.

Path

Source: (SDK root)\Samples\Multimedia\DInput\Src\Scrawl

Executable: (SDK root)\Samples\Multimedia\DInput\Bin

User's Guide

The main mouse button is always the left button, and the secondary button is always the right button, regardless of any settings the user may have made in Control Panel.

To scrawl, hold down the left button and move the mouse. Click the right mouse button to invoke a pop-up menu. From the pop-up menu you can clear the client window, set the mouse sensitivity, or close the application.

Programming Notes

The Scrawl application demonstrates many aspects of DirectInput programming, including the following:

• Using the mouse in exclusive mode in a windowed application.
• Releasing the mouse when Windows needs to use it for menu access.
• Reacquiring the mouse when Windows no longer needs it.
• Reading buffered device data.
• Deferring screen updates till movement on both axes has been fully processed.
• Event notifications of device activity.
• Restricting the cursor to an arbitrary region.
• Scaling raw mouse coordinates before using them.
• Using relative axis mode.