What does Windows error code 1432 (ERROR_INVALID_LB_MESSAGE) mean?

 
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ERROR_INVALID_LB_MESSAGE

The message does not apply to a single-selection list box

List-box styles determine whether the control supports one selected item or multiple selected items. The LBS_MULTIPLESEL and LBS_EXTENDEDSEL styles enable multi-selection behavior; without them, the list box is single-selection.

Messages designed to manipulate multi-selection state are not interchangeable with ordinary current-selection messages. A valid list-box HWND can therefore reject a message because the control was created with the wrong selection model for that operation.

What to check

  • Read the actual LBS_* styles from the created control or dialog resource.
  • Use LB_GETCURSEL/LB_SETCURSEL for a single-selection control.
  • Use the documented multi-selection messages only with the corresponding styles.
  • If the product requirement changed, recreate or redefine the control with the intended selection model.

This is different from ERROR_WINDOW_NOT_COMBOBOX or an invalid handle: the target is a list box, but its selection style makes the message invalid.

References

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