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I posted this on the win32.programmer.ui newsgroup but need a quicker answer.
I have some c# which is using the user32.dll to get the window information.
But I need to provide a class name and get back the text of a control inside
the window I have the handle for.
so I need something like....
getControlText(IntrPtr hWnd, String classname, out mytext)
where hWnd will be the hdnale for the window, classname is the classname of the control and mytext will get back the text in that control.
or if I could get the ID of the control based on a classname and then use
the id to grab the text, that of course would work too.
int getControlId(IntrPtr hWnd, String classname)
getControlText(IntrPtr hWnd, int controlId, out mytext)
Thanks in advance.
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| madhombre Wednesday, June 28, 2006 3:10 PM |
It
sounds like you have the window handle to a dialog window but not the
handle to the controls on that dialog. You'll need to guess the
ID that was assigned to the control. First try calling
GetDlgItem() for all possible IDs so you'll know what ID was
used. Call GetDlgItemText() to retrieve the text or title
associate with the control.
I'm not sure if this is going to
work if you access a dialog in another process, you may have to play
some nasty games (VirtualAllocEx, ReadProcessMemory et al) to get the
text. See this webpage for reference...
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| nobugz Wednesday, June 28, 2006 3:55 PM |
"First try calling GetDlgItem() for all possible IDs so you'll know what ID was used.First try calling GetDlgItem() for all possible IDs so you'll know what ID was used."
Do you mean grab all controls on the window and just go thru them until I find the one I want (how do I get the controls?)
OR just try all control ids like 0 theu 10000 or some such? Seems like a huge cludge.
Thanks for the help. |
| madhombre Wednesday, June 28, 2006 6:37 PM |
I
assumed you're trying to grab data off a program whose source you do
not have available. The only way to find out what IDs the
original programmer used is to try them all. You only need to do
that once, assigned IDs don't change. Once you figured out the ID
you need, you can then write your program using the ID you know will
work.
Then again, I might completely misunderstand your request...
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| nobugz Wednesday, June 28, 2006 6:50 PM |
ok so I have a little program called Auto It and it seems to give me a control Id BUT
when I write out the result of the call I get0
here is the code...
IntPtr hParent = IntPtr.Zero;
IntPtr hNext = IntPtr.Zero;
String sClassNameFilter = "EKPANEL";
do
{
hNext = FindWindowEx(hParent, hNext, sClassNameFilter, IntPtr.Zero);
if (!hNext.Equals(IntPtr.Zero))
{
STRINGBUFFER sLimitedLengthWindowTitle;
GetWindowText(hNext, out sLimitedLengthWindowTitle, 256);
Console.WriteLine(sLimitedLengthWindowTitle.szText);
Console.WriteLine(GetDlgItem(hNext, 53)); // Control Id per auto it
}
while (!hNext.Equals(IntPtr.Zero));
} |
| madhombre Wednesday, June 28, 2006 7:50 PM |
This article suggests that GetDlgItem() could work from another process. Other than that, I have no idea...
Note: not sure but it is probably a good idea to initialize the StringBuffer like this:
sLimitedLengthWindowTitle(256);
Then use the return value from GetWindowText to trim the buffer into a string.
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| nobugz Wednesday, June 28, 2006 8:32 PM |
looping thru the children using recursion but it hits the end of the chain and keeps going,
GetNextDlgGroupItem never returns anything I can sense it is the end of the chain!
I will keep at it. |
| madhombre Thursday, June 29, 2006 6:37 PM |
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