I have a vb.net application that uses ShowDialog() to open child screens.
Long story short, I had issues with focusing the control if I opened IE on top of my program without minimizing the program. Once I reactivated my program and closed a child window, IE would show again instead of my program. I fixed this by setting the owner of my form.
Now I have another issue. After setting the owner, the parent (text) name of my form is now being shown at the top of the application when a child screen is open instead of the parent name. How can I fix this to show only the child's text form name when a child screen is open?
I tried several things like trying to set the name of the parent's text property.
The only way I could get this to work was by removing the line where I set the owner of my child control, and after the showDialog, setting the parent focus to true:
form.ShowDialog()
Me.Visible = True
Related
I've learned how to create a child window within the parent window, but I want to create a window outside the program's primary window. If I'm not mistaken, a window outside the primary one is still a child window, right? Does it have its own class that needs to be registered? I tried just making another window, but changing the arguments. I got some interesting results, but not a separate window.
I've been trying to obtain text from a panel that's part of a third-party application; I have the process ID. To do this, I've gone through the usual EnumProcessModulesEx / GetModuleBaseName / EnumWindows / EnumChildWindows steps. This code works when the panel is shown, but when it's hidden, the panel is no longer seen by my code or Spy++. I'd figured the panel must be destroyed and re-created as the user hides and shows the panel, but it turns out that the HWND of the panel is valid in both situations (GetWindow, GetTitle, etc. all return without errors, and with the same information, so the handle hasn't been re-used); the only difference is that its parent is different. When I trace the parent chain back to the root, the topmost parent's title is WindowsFormsParkingWindow, same process ID. I searched for WindowsFormsParkingWindow, and it seems to be a temporary place to "park" a HWND when you don't need it, so you won't have to re-create the window and its children. Does anyone know of an API for traversing the WindowsFormsParkingWindow hierarchy, or some other way of getting to this panel? Thanks for any advice.
WindowsFormsParkingWindow is a message-only window.
You can enumerate message-only windows by calling FindWindowEx with the special window handle HWND_MESSAGE.
Based on information from this blog:
Flashback: Windows Forms Parking Window
The Parking Window is just a generic parent window used for arbitrarily re-parenting child windows onto during parent window recreations. There is no API to query information from the Packing Window itself, such as the original parent window for any given parked child window. Only the original parent/control knows which child HWND(s) have been parked so they can be retrieved when needed.
The best you are likely to accomplish is to detect when the panel is visible, remember that HWND, and then just use that HWND when needed, even when the panel is not visible. Or at least enumerate the WindowsFormsParkingWindow to check if that HWWND is still a child of it, etc. But if the panel is losing its text while parked, then you are likely to be out of luck.
I want to be able to update a parent window with a child window's selection. Let me put it this way, I have a field called Clients with a '+' button next to it. When someone clicks on the '+' button, I want it to open a new window with a table to search the entire dbo.clients.
Once the person has found the record they want, when they double click on it, I want the child window to close and the textbox in the parent window to update with the value chosen in the child one.
Can someone please give me a hand with the code?
it is more a JavaScript Problem than a asp Problem. try to use window.opener to address the parent window
Is it possible to create a dialog ressource with a resource editor and then put this dialog (possibly multiple times) into another dialog?
Here's some background. I need to create a C++ program (Windows). The user needs to input a set of similar data on a dialog. Say, for simplicity's sake, an element of this data-set consist of an edit control and a scrollbar. Since this combination (edit + scrollbar) needs to be put onto the dialog for each element for the data-set, I thought I could create a simple dialog with just one edit control and one scrollbar, and then put this dialog mutliple times onto its "parent" dialog.
So, is this possible at all. Any pointers will be greatly appreciated.
Yes, you can do this.
In the dialog editor, set the "Control Parent" flag on the parent dialog. (This will ensure the tab key works to cycle through items in the child dialogs as if they were part of the parent dialog.)
Make sure the child dialog(s) have the "Child" flag set in the dialog editor. Visually, they'll look like dialogs without any border at all in the editor.
At runtime, create the child dialogs as children of the parent dialog using CreateDialog (or CreateDialogParam, etc.). When calling CreateDialog you specify the dialogproc for each window.
I often make the child dialog procs do little more than forward messages to the main window's dialog proc (calling it directly; not via SendMessage), but you have to be careful, obviously. You have to be especially careful if you are creating multiple copies of the same dialog in a single parent, since obviously the control IDs within that dialog will all be the same and you need to differentiate them (perhaps by the parent's hWnd).
You don't have to forward messages to the parent, though. I just do usually do that so that most of the dialog's logic is in one place instead of spread out.
EDIT: Corrected statements about creating the child dialogs, window classes etc. I was mixing up dialogs and normal windows, making things more complex than they are in this case. Sorry about that!
I'd like to obtain the same values via code. However I'd like to obtain the top-most or root windows in the hierarchy
I seem to have got the Root Parent with
HWND rootWinHandle = GetAncestor(activatedWinHandle, GA_PARENT);
However I can't get the owner window correctly. Tried
HWND rootOwnerWinHandle = GetAncestor(activatedWinHandle, GA_ROOTOWNER);
For a particular modeless dialog, Spy++ returns the Main Exe window whereas the above line returns the input i.e. activatedWinHandle. Am I looking at the wrong api ?
I'd like to obtain this without MFC if possible... coz nothing else in my project requires it.
See the GW_OWNER flag for GetWindow.
The GetParent documentation states:
If the window is a child window, the return value is a handle to the parent window. If the window is a top-level window, the return value is a handle to the owner window.
Try GetParent(). I believe this will return the owner window of a window without the WS_CHILD style, and the parent window of a window with WS_CHILD.
Only bit of insight i can add it from Raymond Chen:
Remember that owner and parent are two
different things.
Modal dialogs disable their OWNERs.
All top-level windows have the desktop
as their PARENT.
From: What's so special about the desktop window?
Special demo (+src):
http://files.rsdn.ru/42164/parentowner.zip
screenshot: http://files.rsdn.ru/42164/parentowner.png
kero