I am not too sure why GetProcAddress is returning nil, but a few points: 1) you do not need to typecast string literals as PChar
FGetAsText := GetProcAddress (FHandle, 'clipboard_getastext'); 2) You really should not return strings as PChar, passing them is fine, but return, nope result := PChar (Clipboard.AsText); Why? Because string types are managed and referenced counted. The project returning the string is likely to deallocate the memory returned upon exit (unless you save a copy locally) . A better approach would be to have the caller allocate the memory and return the expected buffer size: function clipboard_getastext(Buffer: PChar; BufferSize: Integer): Integer;
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