Altering the Main Application
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If using modeless TWAIN processing, the application loop must be altered. Below describes the traditional application loop, the "normal" TWAIN application loop, and the "DTWAIN" application loop.
Here is a normal, application message loop. Example of Traditional Application Message Loop
Normally, a TWAIN enabled application would need to alter the message loop similar to this: Example of TWAIN Application Message Loop Alterations
A DTWAIN application that desires to alter the application's message loop needs only to do this: Example of DTWAIN Application Message Loop Alterations
To specify that the application desires to alter the application loop, the DTWAIN_SetTwainMode must be called before the main application loop starts processing messages. By default, DTWAIN assumes that the application will not alter the application loop; so calling this function is mandatory. |