載入ｄｌｌ時 請問變數（dllname）怎麼宣告？ 因為都會出現'Unknown directive:dllname'的訊息。 謝謝！！ unit MaxUnit; interface function Max(I1,I2:integer):integer; var dllname:string; implementation dllname:'maxlib.dll'; function Max; external dllname name 'Max'; end.

I think you cannot has shared variable in a dll implemented by Delphi/BCB. In fact, your host application and the dll have their own independent instance of memory storage. Perhaps you could make use of memory mapped file? Or simply export function to get set the variable in dll? Remember to use ShareMem when passing string...

unit MaxUnit;    interface function Max(I1,I2:integer):integer;        implementation    const  dllname='maxlib.dll';    function Max; external dllname name 'Max';    end.    僅供參考,歡迎繼續發言願以此功德 莊嚴佛淨土 上報四重恩 下濟三塗苦 若有見聞者 悉發菩提心 盡此一報身 同生極樂國

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可以了，謝謝！！ 但，為什麼要用常數宣告才可？

To import routines from a dynamically loadable library (.so or .DLL), attach a directive of the form    external stringConstant; to the end of a normal procedure or function header, where stringConstant is the name of the library file in single quotation marks.

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雖然不是很懂，還是謝謝你!!