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ERROR_NO_WILDCARD_CHARACTERS
The operation expected a wildcard pattern
Classic USER controls include messages that populate list and combo controls from file-system-style patterns, such as LB_DIR and CB_DIR. These operations are pattern-driven rather than ordinary item insertion.
The error indicates that the specific path through USER32 expected wildcard syntax but the supplied string did not provide it. It should not be generalized into a file-not-found condition: no directory enumeration result has to be produced before the parameter contract can fail.
What to check
- Capture the exact message or helper macro used to populate the control.
- Log the pattern after environment expansion and path normalization.
- Use ordinary add/insert messages when the input is a literal item rather than a search pattern.
- If directory enumeration is intended, verify the caller preserved wildcard characters while building the string.
A valid wildcard pattern that matches nothing is a different outcome; this code is about the requested wildcard operation lacking wildcard syntax.
References
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