Dll调用问题

[jianping0]

我在dll中输出了几个函数,在另一程序中用隐式调用可以调用,但用动态调用却提示找不到
指定的模块,另外,在MDI环境中,DLL中的MDI子窗体如何释放.

[jianping0]

dll高手出招吧!

[pdsinfo]

可以把具体的代码贴出来吗?

[liang_z]

动态调用要注意函数名的大小写有关！

[jianping0]

谢谢:liang_z(千山一刀之忍者神龟)　 果然是大小写的问题,等一下给分;
不知道第二个问题如何? 在MDI环境中用调用DLL,应如何释放DLL好呢? 不然,在主程序关闭时老是出错?

[yuzhizhi]

那要看你的DLL作用范围了！
然后在onclose中FreeDll吧

[liang_z]

我一般都是静态调用MDI的DLL，
所以不用Free DLL的句柄。

[jianping0]

to: yuzhizhi(小志), liang_z(千山一刀之忍者神龟)
不知道你们是如何控制的能不能贴段代码出来看看.

[liang_z]

unit Main;

interface

uses Windows, SysUtils, Classes, Graphics, Forms, Controls, Menus,
StdCtrls, Dialogs, Buttons, Messages, ExtCtrls, ComCtrls, StdActns,
ActnList, ToolWin, ImgList;

type
TMainForm = class(TForm)
MainMenu1: TMainMenu;
File1: TMenuItem;
FileNewItem: TMenuItem;
FileOpenItem: TMenuItem;
FileCloseItem: TMenuItem;
Window1: TMenuItem;
Help1: TMenuItem;
N1: TMenuItem;
FileExitItem: TMenuItem;
WindowCascadeItem: TMenuItem;
WindowTileItem: TMenuItem;
WindowArrangeItem: TMenuItem;
HelpAboutItem: TMenuItem;
OpenDialog: TOpenDialog;
FileSaveItem: TMenuItem;
FileSaveAsItem: TMenuItem;
Edit1: TMenuItem;
CutItem: TMenuItem;
CopyItem: TMenuItem;
PasteItem: TMenuItem;
WindowMinimizeItem: TMenuItem;
StatusBar: TStatusBar;
ActionList1: TActionList;
EditCut1: TEditCut;
EditCopy1: TEditCopy;
EditPaste1: TEditPaste;
FileNew1: TAction;
FileSave1: TAction;
FileExit1: TAction;
FileOpen1: TAction;
FileSaveAs1: TAction;
WindowCascade1: TWindowCascade;
WindowTileHorizontal1: TWindowTileHorizontal;
WindowArrangeAll1: TWindowArrange;
WindowMinimizeAll1: TWindowMinimizeAll;
HelpAbout1: TAction;
FileClose1: TWindowClose;
WindowTileVertical1: TWindowTileVertical;
WindowTileItem2: TMenuItem;
ToolBar2: TToolBar;
ToolButton1: TToolButton;
ToolButton2: TToolButton;
ToolButton3: TToolButton;
ToolButton4: TToolButton;
ToolButton5: TToolButton;
ToolButton6: TToolButton;
ToolButton9: TToolButton;
ToolButton7: TToolButton;
ToolButton8: TToolButton;
ToolButton10: TToolButton;
ToolButton11: TToolButton;
ImageList1: TImageList;
procedure FileNew1Execute(Sender: TObject);
procedure FileOpen1Execute(Sender: TObject);
procedure HelpAbout1Execute(Sender: TObject);
procedure FileExit1Execute(Sender: TObject);
private
{ Private declarations }
procedure CreateMDIChild(const Name: string);
public
{ Public declarations }
end;

var
MainForm: TMainForm;

//在这儿定义：
procedure CreateChildForm(MainApp:THandle);stdcall; external 'ChildDll.dll';

implementation

{$R *.DFM}

uses About;

procedure TMainForm.CreateMDIChild(const Name: string);
var
H: HWnd;
iMy: procedure(MainApp:THandle);stdcall;
begin
{ create a new MDI child window }
CreateChildForm(Application.Handle);
end;

procedure TMainForm.FileNew1Execute(Sender: TObject);
begin
CreateMDIChild('NONAME' + IntToStr(MDIChildCount + 1));
end;

procedure TMainForm.FileOpen1Execute(Sender: TObject);
begin
if OpenDialog.Execute then
CreateMDIChild(OpenDialog.FileName);
end;

procedure TMainForm.HelpAbout1Execute(Sender: TObject);
begin
AboutBox.ShowModal;
end;

procedure TMainForm.FileExit1Execute(Sender: TObject);
begin
Close;
end;

end.

[liang_z]

library ChildDll;

{ 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,
SysUtils,
Classes,
Forms,
Child in 'Child.pas' {Form1};

var
DllApp : THandle;
{$R *.RES}

procedure MyDLLProc(Reason: Integer);
begin
// DLL is unloading. Restore the Application pointer.
if Reason = DLL_PROCESS_DETACH then
begin
if DllApp<>0 then
Application.Handle := DllApp;
end;
end;

procedure CreateChildForm(MainApp:THandle);stdcall;export;
var
Child : TForm1;
begin
if not DllApp<>0 then
begin
DllApp := Application.Handle;
Application.Handle := MainApp;
end;

Child := nil;
try
Child := TForm1.Create(Application);
Child.Show();
except
Child.Free();
end;
end;

exports
CreateChildForm;

begin
DLLProc := @MyDLLProc;
end.

[jianping0]

to: liang_z(千山一刀之忍者神龟)
在关闭Dll子窗体Form1时,是不是和关闭一般的MDI子窗体一样啊?