Reply message formats

When an application makes an asynchronous call requesting notification by message, the ECI returns the result in a message to a window using the specified window handle and message identifier.

The message is divided into two parameters, as follows:
wParam
High-order 16 bits
Specified message qualifier
Low-order 16 bits
Return code
lParam
4-character abend code, if applicable

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Timestamp icon Last updated: Tuesday, 19 November 2013


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