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showing a dll form in a panel in main app

Darth_helge
Darth_helge asked
on
Medium Priority
1,132 Views
Last Modified: 2011-04-14
My form A will call another TCustomForm from a DLL and place it on a panel in the main program.
But when I do this my dbgrids don't behave like they should. I can't navigate with my up_key and down_key.

I know that if rewrite the code and shows the tcustomform in the dll as showmodal the dbgrids behave perfect.
How can I do this when the form is hooked to the panel in the mainform too?

In Main (where I call the form):

ShowDllIRForm(MainForm.Handle).ParentWindow := MainPanel.Handle;
ShowDllIRForm(MainForm.Handle).Show;


In DLL (returns the form):

function ShowDllIRForm(hApp: THandle): TCustomForm; stdcall;
begin
 Application.Handle := hApp;
  if not assigned(IRForm) then
    IRForm := TIRForm.Create(Application);
  result := IRForm;
end;
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Top Expert 2004
Commented:
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Author

Commented:
yes
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Top Expert 2004

Commented:
well,

i myelf didn't done a form in a dll,
therefore i can't point directly to thats it.

i know there are problems to embed bordered forms,
thats why i asked, if it is a borderless form.

as it is a borderless form, i'm out of ideas

will do a bit recherche

meikl ;-)

Author

Commented:
the borderstyle is bsnone and the formstyle is fsnormal

Commented:
the use of SetParent API could solve the focus & keys problems,
SetParent(DLLForm.Handle, MainPanel.Handle);

Commented:
Hi I believe I have tried setparent...

Could you show a small example of the code.. ?
Have you tried it?

cheers,
mha

Commented:
here's some snippets from a project i'm working on

IProjectMgr = interface
  ['{B5427304-4D62-478A-99DF-3228F2185038}']
   function CreatePluginForm(const PluginClass:TPluginFormClass;const AOwner:TComponent;
                                             const AParent:TWinControl;const Sender:TObject):TPluginForm;
end;

IProjectMgr is implemented in TProjectMgrForm as follows:

function TProjectMgrForm.CreatePluginForm(const PluginClass:TPluginFormClass;const AOwner:TComponent;
                                             const AParent:TWinControl;const Sender:TObject):TPluginForm;
begin
  Result:=PluginClass.Create(AOwner) as TPluginForm;
  with Result do
  begin
     BorderStyle:=bsNone;//can be set at design time
     Windows.SetParent(Handle, AParent.Handle);
     Align:=alClient;
     Show;
  end;//with
end;

the Application(Host Application) is passed to the plugin DLL in the exported register procedure, so the plugin can get the interface IProjectMgr and calls CreatePluginForm passing to the Host App the PluginClass,and the creation of the pluginform is handled in the host application.

//still have only one problem ,. the align property of child controls in the plugin form, does'nt work correctly.
//everything else is OK
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