cxgrid ib dll delphi



你好,我写插件dll从主窗体调用dll

type
  TCreateCustomWindow=function(ParentFrame:TWinControl; ParentHandle:integer; ParentRect:TRect; var WinHandle:THandle):integer; stdcall;
var
CreateW:TCreateCustomWindow;
begin
CreateW:=GetProcAddress(FHLib,'Create_LEF');
if Assigned(CreateW) then
begin
  if Assigned(CreateW) then LEFT_OKNO:=CreateW(ScrollBox2, ScrollBox2.Handle, ClientRect, FChildHandle);
end;

在dll本身中,它看起来像

function Create_LEF(ParentFrame:TWinControl; ParentHandle:integer; ParentRect:TRect; var WinHandle:THandle):integer; stdcall; export;
begin
  Result:=0;
  WinHandle:=0;
  try
    FD3:=TForm3.Create(nil);
    FD3.Parent:= ParentFrame;
    Result:=integer(FD3);
    WinHandle:=FD3.Handle;
    if ParentHandle<>0 then begin
      SetParent(WinHandle,ParentHandle);
      with FD3 do begin
      FD3.Align:=alTop;
      FD3.Width:=ParentFrame.Width;
      hirina_left:=ParentFrame.Width;
      FD3.Show;
      end;
    end;
  except
    On E:exception do MessageDlg(E.Message,mtError,[mbOK],0);
  end;
end;

问题是我不能编辑单元格cxGrid我能做错什么吗?

我以前遇到过这种情况,有几种方法可以解决。这是很久以前的事了,所以你必须做一些尝试和错误。

function Create_LEF(ParentFrame:TWinControl; ParentHandle:integer; ParentRect:TRect; var WinHandle:THandle):integer; stdcall; export;
begin
  Result:=0;
  WinHandle:=0;
  try
    FD3:=TForm3.Create(nil);
    FD3.Parent:= ParentFrame;
    Result:=integer(FD3);
    WinHandle:=FD3.Handle;
    if ParentHandle<>0 then begin
      with FD3 do begin
        ParentWindow := ParentFrame.Handle;
        Parent := ParentFrame;
        Align:=alTop;
        Width:=ParentFrame.Width;
        hirina_left:=ParentFrame.Width;
        Show;
      end;
    end;
  except
    On E:exception do MessageDlg(E.Message,mtError,[mbOK],0);
  end;
end;

这应该能解决你的问题。如果失败,请尝试将DLL的Application.Handle设置为应用程序的Application.HHandle。我通常使用DLL中的Init函数来执行此操作。此函数将DLL的Application.Handle存储在全局变量中,并将其重新分配给应用程序的句柄,作为参数传递给函数。当你卸载DLL时,你会将DLL的应用程序赋值。handle返回到它的原始值,否则一切都会出错。

var
    FOldHandle: THandle;
procedure Init(AHandle: THandle); stdcall;
begin
    FOldHandle := Application.Handle;
    Application.Handle := AHandle;
end;
procedure UnInit; stdcall;
begin
    Application.Handle := FOldHandle;
end;
...

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