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spyder
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编译通过了！可是运行时弹出了showmessage（‘11’），说明没有调用这个函数啊！！大家帮忙看看！主程序代码！unit Unit1;interfaceuses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls, ExtCtrls;type TGetCaption = function
char; stdcall; //tshowdllform=function(father:Tpanel): boolean;stdcall; TMyPlugin=class caption:string; end; TForm1 = class(TForm) Panel1: TPanel; Button1: TButton; ComboBox1: TComboBox; procedure Button1Click(Sender: TObject); private { Private declarations } public { Public declarations } end;var Form1: TForm1; father:tpanel; //showdllform:tshowdllform; getcaption:tgetcaption;implementation{$R *.dfm}procedure TForm1.Button1Click(Sender: TObject);var dllname:string; hinst:thandle; fpointer:tfarproc; MyPlugin: TMyPlugin;begin myPlugin := TMyPlugin.Create; father:=panel1; getdir(0,dllname); dllname:=dllname+'/project1.dll'; hinst:=safeloadlibrary(dllname); if hinst>0 then try //Fpointer:=getprocaddress(hinst,'showdllform'); fpointer:=getprocaddress(hinst,'getcaption'); if (fpointer<>nil)then begin //showdllform(fpointer); getcaption:=tgetcaption(fpointer); getcaption; myPlugin.caption:=getcaption; combobox1.Items.Add(myplugin.caption); end else showmessage('11'); finally freelibrary(hinst); end else showmessage('22');end;end.DLL函数代码：library Project1;{ Important note about DLL memory management: ShareMem must be the first unit in your library's USES clause AND your project's (select Project-View Source) USES clause if your DLL exports any procedures or functions that pass strings as parameters or function results. This applies to all strings passed to and from your DLL--even those that are nested in records and classes. ShareMem is the interface unit to the BORLNDMM.DLL shared memory manager, which must be deployed along with your DLL. To avoid using BORLNDMM.DLL, pass string information using PChar or ShortString parameters. }uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, ExtCtrls, StdCtrls, ComCtrls;{$R *.res}function GetCaptionchar; stdcall;begin Result:='FA506';end;function ShowDLLForm(father:Tpanel): boolean;stdcall;var aa:tedit;begin result:=true; aa:=tedit.create(nil); aa.parent:=father; aa.top:=20; aa.left:=20;end;exports GetCaption,ShowDLLForm;end.
char; stdcall; //tshowdllform=function(father:Tpanel): boolean;stdcall; TMyPlugin=class caption:string; end; TForm1 = class(TForm) Panel1: TPanel; Button1: TButton; ComboBox1: TComboBox; procedure Button1Click(Sender: TObject); private { Private declarations } public { Public declarations } end;var Form1: TForm1; father:tpanel; //showdllform:tshowdllform; getcaption:tgetcaption;implementation{$R *.dfm}procedure TForm1.Button1Click(Sender: TObject);var dllname:string; hinst:thandle; fpointer:tfarproc; MyPlugin: TMyPlugin;begin myPlugin := TMyPlugin.Create; father:=panel1; getdir(0,dllname); dllname:=dllname+'/project1.dll'; hinst:=safeloadlibrary(dllname); if hinst>0 then try //Fpointer:=getprocaddress(hinst,'showdllform'); fpointer:=getprocaddress(hinst,'getcaption'); if (fpointer<>nil)then begin //showdllform(fpointer); getcaption:=tgetcaption(fpointer); getcaption; myPlugin.caption:=getcaption; combobox1.Items.Add(myplugin.caption); end else showmessage('11'); finally freelibrary(hinst); end else showmessage('22');end;end.DLL函数代码：library Project1;{ Important note about DLL memory management: ShareMem must be the first unit in your library's USES clause AND your project's (select Project-View Source) USES clause if your DLL exports any procedures or functions that pass strings as parameters or function results. This applies to all strings passed to and from your DLL--even those that are nested in records and classes. ShareMem is the interface unit to the BORLNDMM.DLL shared memory manager, which must be deployed along with your DLL. To avoid using BORLNDMM.DLL, pass string information using PChar or ShortString parameters. }uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, ExtCtrls, StdCtrls, ComCtrls;{$R *.res}function GetCaptionchar; stdcall;begin Result:='FA506';end;function ShowDLLForm(father:Tpanel): boolean;stdcall;var aa:tedit;begin result:=true; aa:=tedit.create(nil); aa.parent:=father; aa.top:=20; aa.left:=20;end;exports GetCaption,ShowDLLForm;end.
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