本人查找了很多资料,想把Delphi窗体放到Dll文件中,源代码如下:
1. 在DLL设定的Form的设置
unit MGRPERFM;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
ComCtrls, ToolWin, ImgList;
type
TFormPERSON = class(TForm)
private
{ Private declarations }
public
{ Public declarations }
end;
//var
// FormPERSON: TFormPERSON;
function ShowPerSN(AHandle: THandle; ACaption: String):BOOL; StdCall;implementation{$R *.DFM}
//函数据过程定义
function ShowPerSN(AHandle: THandle; ACaption: String):BOOL;
var
FormPERSON: TFormPERSON; //定义窗体类(上面的放到了此处)
begin
// Copy application handle to DLL's TApplication object
//拷贝应用程式句柄给DLL的应有程式对象
Application.Handle := AHandle;
FormPERSON := TFormPERSON.Create(Application);//创建控件TForm
try
FormPERSON.Caption := ACaption;
FormPERSON.ShowModal;//显示此Form
// Pass the date back in Result
Result := False; //反回成功值
finally
FormPERSON.Free;
end;
end;
2.调用
type //在此创建一个函数类
TShowPerSN = function (AHandle: THandle; ACaption: String): BOOL; StdCall;
EDLLLoadError = class(Exception);//同时分创建一个出错记录类
TMAINCLTR = class(TForm) //这里不变,系统自动生成
......
procedure TMAINCLTR.ToolButton1Click(Sender: TObject);
var //按钮的调用事件:调用过程
LibHandle: THandle;
ShowPerSN: TShowPerSN;
begin
Application.Title:='人力资源管理系统DLL文件测试程式';
{ Attempt to load the DLL 尝试装入DLL文件}
LibHandle := LoadLibrary('MGRPERSN.DLL');
try
if LibHandle = 0 then
raise EDLLLoadError.Create('Unable to Load DLL(无法成功装入MGRPERSN.DLL)');
@ShowPerSN := GetProcAddress(LibHandle, 'ShowPerSN');
if not (@ShowPerSN = nil) then
ShowPerSN(Application.Handle, '人事资料管理')//呼叫出窗体
else
RaiseLastWin32Error;
finally
FreeLibrary(LibHandle); // Unload the DLL.
end;
end;
但是运行后报错,错误提示如下:
Access violation at dress 00403AA in module 'project1.exe'. Read of address 0153AF50.
请问上面Dll的创建、调用是否正确,若不正确,该怎么改?谢谢!
1. 在DLL设定的Form的设置
unit MGRPERFM;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
ComCtrls, ToolWin, ImgList;
type
TFormPERSON = class(TForm)
private
{ Private declarations }
public
{ Public declarations }
end;
//var
// FormPERSON: TFormPERSON;
function ShowPerSN(AHandle: THandle; ACaption: String):BOOL; StdCall;implementation{$R *.DFM}
//函数据过程定义
function ShowPerSN(AHandle: THandle; ACaption: String):BOOL;
var
FormPERSON: TFormPERSON; //定义窗体类(上面的放到了此处)
begin
// Copy application handle to DLL's TApplication object
//拷贝应用程式句柄给DLL的应有程式对象
Application.Handle := AHandle;
FormPERSON := TFormPERSON.Create(Application);//创建控件TForm
try
FormPERSON.Caption := ACaption;
FormPERSON.ShowModal;//显示此Form
// Pass the date back in Result
Result := False; //反回成功值
finally
FormPERSON.Free;
end;
end;
2.调用
type //在此创建一个函数类
TShowPerSN = function (AHandle: THandle; ACaption: String): BOOL; StdCall;
EDLLLoadError = class(Exception);//同时分创建一个出错记录类
TMAINCLTR = class(TForm) //这里不变,系统自动生成
......
procedure TMAINCLTR.ToolButton1Click(Sender: TObject);
var //按钮的调用事件:调用过程
LibHandle: THandle;
ShowPerSN: TShowPerSN;
begin
Application.Title:='人力资源管理系统DLL文件测试程式';
{ Attempt to load the DLL 尝试装入DLL文件}
LibHandle := LoadLibrary('MGRPERSN.DLL');
try
if LibHandle = 0 then
raise EDLLLoadError.Create('Unable to Load DLL(无法成功装入MGRPERSN.DLL)');
@ShowPerSN := GetProcAddress(LibHandle, 'ShowPerSN');
if not (@ShowPerSN = nil) then
ShowPerSN(Application.Handle, '人事资料管理')//呼叫出窗体
else
RaiseLastWin32Error;
finally
FreeLibrary(LibHandle); // Unload the DLL.
end;
end;
但是运行后报错,错误提示如下:
Access violation at dress 00403AA in module 'project1.exe'. Read of address 0153AF50.
请问上面Dll的创建、调用是否正确,若不正确,该怎么改?谢谢!
//********************
Exports
ShowPerSN;
//*********************
var
FormPERSON: TFormPERSON; //定义窗体类(上面的放到了此处)
begin
// Copy application handle to DLL's TApplication object
//拷贝应用程式句柄给DLL的应有程式对象
Application.Handle := AHandle;
FormPERSON := TFormPERSON.Create(Application);//创建控件TForm
try
FormPERSON.Caption := ACaption;
FormPERSON.ShowModal;//显示此Form
// Pass the date back in Result
Result := False; //反回成功值
finally
FormPERSON.Free;
end;
end;
exports ShowPerSN;
library MGRPERSN;
uses
SysUtils, Classes,
MGRPERFM in 'MGRPERFM.pas' {FormPERSON};//1.Form的代码(与一般的Form一样){$R *.RES}
exports
ShowPerSN;//2.函数输出口定义
begin
end.
选中build with runtime packages
选中build with runtime packages
或者把function ShowPerSN(AHandle: THandle; ACaption: String):BOOL; StdCall;该为function ShowPerSN(AHandle: TApplication; ACaption: String):BOOL; StdCall;Application := Ahandle