HRESULT 0x80072F7A (WININET_E_INVALID_QUERY

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The request to query an HTTP header is invalid.

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WININET_E_INVALID_HEADER	WININET_E_HEADER_ALREADY_EXISTS

WININET_E_INVALID_QUERY_REQUEST

WININET_E_INVALID_QUERY_REQUEST is a WinINet HRESULT. It means that the arguments supplied to a header-query operation are invalid. This commonly occurs when an unsupported query flag, handle, buffer format or index is passed to HttpQueryInfo.

What to check

Verify the query attribute, modifiers and custom-header parameters against the documentation for HttpQueryInfo.
Use a valid HTTP request handle and query it only after request headers or response headers are available.
Check buffer sizes, index initialization and ANSI versus Unicode function selection.

Microsoft documentation

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