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Using Gestalt to Get the QuickTime Version

As always, the standard way for Apple developers to determine which version of QuickTime is installed is by calling the Macintosh Toolbox Gestalt function.

The following code snippet demonstrates how you can check the version of QuickTime that is installed––in this case, QuickTime 6.4. The number 0x06408000 tests for the shipping version of QuickTime 6.4 but fails on prerelease versions.

    /* check the version of QuickTime installed */

    long     version;

    OSErr    result;

    result = Gestalt(gestaltQuickTime, &version);

    if ((result == noErr) && (version >= 0x06408000))

    {

        /* we have version 6.4! */

    }

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