Problem developping a WCX Plugin GUI in Delphi

[franck8244]

I'm writting a wcx packer plugin that will be able to retrieve wdx info from file and save them in a text file...
The "engine" work but I have a bug with the GUI !

Here is my problem :

1- Open a TC (ini file "empty" except with this plugin : for debugging)
2- Alt+F5 (after selecting files) -> The Pack Dialog opens
3- Pressing Configure the Plugin->Open my GUI (On this GUI I have a button to close it , )
4- Pressing the Close Button->"I" return to the Packing options

Repeating 3 & 4 works fine (my GUI is opened and closed) ...

doing 1 - 2 - 3 - 4 then Cancelling->the Pack dialog is closed then doing 2 - 3 throw an exception : System Error Code 1400 : invalid Window handle

I can provide my "testing this problem" source
If someone can help ...
Thanks

[Sheridan]

can you post code where you create and destroy a Configure window?

[franck8244]

I'll post link to this source as soon as I can , I have not the time yet .

Short explanations:
Creating my Gui in ConfigurePacker :
MyForm:=MyClass.CreateParented(ParentHandle);
MyForm.show
button to close it : Self.close

The place of the "MyForm.show" can be in the OnCreate procedure, the result is the same

I used Procfs.wfx (from another TC instance) to see if my form was still existing (and a new one was creating each time) but there is only one gui at the same time (the form is truly closed (not hide) then recreated)

I also tried to place my Gui in a separate DLL and calling it with getprocadress but the result is the same


Anyway, I'll give link soon

[Sheridan]

Maybe can be will help send WM_PARENTNOTIFY message with WM_DESTROY to parent?
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/windowing/windows/windowreference/windowmessages/wm_parentnotify.asp

[franck8244]

I have tried to send WM_PARENTNOTIFY but the result is the same

Here is my problem with the smallest gui (1 button on a form) to test this problem...

Here with my "full" form
(The Button to close the form is "Button2")

[Sheridan]

im make programs int c++builder6...
Ghm... First. You certain that your FindWindow fuction find a yor wnd Parent? Or into your wcx you send a message to Form.....->Parent->Handle (or to stored handle from ConfigurePacker)?

[franck8244]

I tried this morning : the FindWindow function find the correct Parent Handle...

[ghisler(Author)]

Hmm, my guess is that Delphi/C++ Builder is doing something strange in the CreateParented method. Could you try instead with a normal "Create" and then a ShowModal or so?

[franck8244]

Could you try instead with a normal "Create" and then a ShowModal or so?

Thanks, the simple create works like a charm
I'll use my GUI (and other functions) in a separate dll to improve the loading time of the wcx