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Hi
Thanks for the answer. But it doesn't tell me what the Message's properties Msg, LParam, WParam and Result are for. When to use them and what to do with them. And the question what to assign to m.Result, how do I know what to assign? I have seen so many examples when I have googled, but no explanation. I have seen m.Result = new IntPtr(charsToCopy)and m.Result= (IntPtr)0 or new IntPtr(0), but how do I know what integer to assign m.Result what does it differ.
Many thanks
Fia
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The values of WPARAM, LPARAM and the return are all dependent on the message being processed. For example here[^] are the details for the WM_GETTEXT message.
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Hi
Thanks again for your answers, but I have till trouble to understand to use m.Result=IntPtr(0) or what to put in IntPtr.
I have two examples I have googled:
In this example it stops users to paste anything to a textbox.
protected override void WndProc(ref Message m)
{
if (m.Msg != WM_PASTE )
{
base.WndProc(ref m);
}
}
In this example users can just paste in numbers in a textbox.
protected override void WndProc(ref Message m)
{
if (m.Msg == WM_PASTE )
{
IDataObject obj = Clipboard.GetDataObject();
string input = (string)obj.GetData(typeof(string));
foreach (char c in input)
{
if (!char.IsDigit(c))
{
m.Result = (IntPtr)0;
return;
}
}
}
base.WndProc(ref m);
}
Why do we have to assign to m.Result the InPtr 0? What is IntPtr and how do I know which int (amount) I should return?
Many thanks
Fia
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As I explained in my previous answer you need to look at the documentation for each message to know what values are represented by the WPARAM and LPARAM input parameters, and what values may be returned if you process the message. For example the documentation for WM_PASTE is here[^]. You also need to read about the default WndProc() method in .NET here[^].
The use of IntPtr in C# is merely a type that corresponds to the 32 bit DWORD in C++, which is the normal return value from these functions.
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If your goal here is to understand P/Invoke and 'WndProc,' and the use of parameters to P/Invokes ... then great, but, if your goal is to make progress in .NET and WinForms or WPF, then there are other techniques you can use to create an input field that only accepts numeric input that do not require getting 'outside the .NET box.'
Check out 'MaskedTextBox' and 'NumericUpDown' in WinForms, for example.
best, Bill
"Beauty is in the eye of the beholder, and it may be necessary from time to time to give a stupid or misinformed beholder a black eye." Miss Piggy"
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Hi,
I work with WPF, and I have got a problem with binding a listbox.
The question is as follows.
I have a left list box of ten list box items. On the right hand I have a border where I can exchange between 10 User Controls.
So, I have a 10 listbox items for ten usercontrols. The problem is how to bind these 10 listitems and make them as a menu, so when I click on one of them I get the right User Control on the right side..
If ther is any solution, send please!
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Article that may help[^]
------------------------------------
I will never again mention that I was the poster of the One Millionth Lounge Post, nor that it was complete drivel. Dalek Dave
CCC Link[ ^]
Trolls[ ^]
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Bind the ListView's SelectedIndex property to something in the view model. Then bind some property of the border which controls which user control is visible to SelectedIndex, or if there's no property that you can bind which does the job, bind the Visible properties of the user controls to SelectedIndex with a binding converter int->bool which checks to see if it's the right one.
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Help. I've spent way too much time on this. I've scoured the web for ways to set the focus on a cell in my grid and I'm using:
dataGridView1.CurrentCell = dataGridView1[e.RowIndex, e.ColumnIndex]; and it doesn't seem to work. I've found (and tried) more cumbersome ways to do it but I always prefer the simple approach. Could it have something to do with the fact that I call the function from the OnCellValidated method after I've tabbed out of the cell with bad data? Any illumination would be appreciated. thank you.
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Tom Paronis wrote: dataGridView1.CurrentCell = dataGridView1[e.RowIndex, e.ColumnIndex]; and it doesn't seem to work. I've found (and tried) more cumbersome ways to do it but I always prefer the simple approach. Could it have something to do with the fact that I call the function from the OnCellValidated method after I've tabbed out of the cell with bad data?
That's very likely; can you post the content of the event here, in PRE tags, and tell us what you're trying to achieve?
You shouldn't be doing any validation in there; that should be done in the OnCellValidating event. That provides a way to "cancel" the action (see it's eventargs) and have the user not move to the next cell. To which cell do you want the user to go when he's trying to tab out of a non-valid entry?
Bastard Programmer from Hell 
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That sounds eminently logical and I will try it first thing tomorrow; it's Miller Time now. FYI, I'm a C++ programmer transitioning to C#/.NET and I try to do everything the C++ way; doesn't always work. Also, I like the handle. Cheers.
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dataGridView500.Rows[rowIndex].Cells[colIndex].Selected = true;
is a candidate.
Warning: I'm not sure this also deselects any previously selected cells/row/columns.
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It doesn't. dataGridView.CurrentCell is what is supposed to do this, I think, but it interacts with validation in an unhelpful way.
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hello;
I have a 3dsmax model. and I want to move this model using kinect. how can ı connect 3ds max file to c#
I will wait your help.
thank you for your help already.
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That's way too much to answer in a single post. You're asking the layout of a complete (commercial!) project? Expecting that anyone 'ere would simply post it?
You could start with downloading the Coding4Fun Kinect Toolkit[^] and studying it.
Bastard Programmer from Hell
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I have written an Outlook 2007 Add-In using Visual Studio 2010 and C# (.NET 4.0). All is well most of the time but I encounter a crash in Outlook once in a while. When the crash occurs it is ONLY when Outlook is disconnected from the Microsoft Exchange server. My work laptop connects wirelessly and my job requires that I connect to two different local wireless networks, depending on the task(s) which I must complete. While on the primary network, Outlook is connected to my employer's MS Exchange server. On the other network, it disconnects (goes into Offline mode). Every once in a while, when disconnecting from the primary network, Outlook crashes, though not every time.
Below is the only code which is executed by the add-in. It runs periodically (every ten minutes).
private void CheckFolderItemsMU(Outlook.Folder folder)
{
if (folder.Folders.Count > 0)
{
foreach (Outlook.Folder f in folder.Folders)
CheckFolderItemsMU(f);
}
if (folder.DefaultItemType != Outlook.OlItemType.olMailItem) return;
if (folder.Name == "Deleted Items" || folder.Name == "Sent Items" || folder.Name == "Outbox") return;
if (folder.Parent.Name != "*COMPANYNAME*") return;
Outlook.Items items = folder.Items;
Outlook.MailItem mailItem = null;
foreach (object collectionItem in items)
{
mailItem = collectionItem as Outlook.MailItem;
if (mailItem != null)
{
string subject = mailItem.Subject.ToUpper();
subject = subject.Replace("FW: ", "");
subject = subject.Replace("FWD: ", "");
subject = subject.Replace("RE: ", "");
if (mailItem.SenderName == "*NAMEOMITTED*")
{
if (string.IsNullOrEmpty(mailItem.Categories))
mailItem.Categories = "*NAMEOMITTED*";
}
else if (mailItem.SenderName == "*NAMEOMITTED*")
{
if (string.IsNullOrEmpty(mailItem.Categories))
mailItem.Categories = "LPS Data";
}
else
continue;
if (mailItem.IsMarkedAsTask) continue;
if (mailItem.Importance != Outlook.OlImportance.olImportanceHigh)
mailItem.Importance = Outlook.OlImportance.olImportanceHigh;
mailItem.MarkAsTask(Outlook.OlMarkInterval.olMarkToday);
mailItem.TaskStartDate = DateTime.Now;
mailItem.TaskDueDate = DateTime.Now.AddHours(1);
if ((DateTime.Now.Hour > 14) && (DateTime.Now.Minute > 45))
{
DateTime dateDue = DateTime.Now.AddDays(1);
if (dateDue.DayOfWeek == DayOfWeek.Saturday) dateDue = dateDue.AddDays(2);
else if (dateDue.DayOfWeek == DayOfWeek.Sunday) dateDue = dateDue.AddDays(1);
dateDue = new DateTime(dateDue.Year, dateDue.Month, dateDue.Day, 7, 0, 0);
mailItem.TaskDueDate = dateDue;
}
else
mailItem.TaskDueDate = DateTime.Now.AddMinutes(20);
mailItem.Save();
}
}
}
Is there anything here which appears to be a problem while Outlook is in Offline Mode?
djj55: Nice but may have a permission problem
Pete O'Hanlon: He has my permission to run it.
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Matt U. wrote: Is there anything here which appears to be a problem while Outlook is in Offline Mode?
How about catching the exception and logging it? Might give a nice hint on why it's crashing.
Bastard Programmer from Hell
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Oh my. That was a complete fail. I have no idea why I did not do that to begin with.  I figured it out. It was the line "if (folder.Folders.Count > 0)".
djj55: Nice but may have a permission problem
Pete O'Hanlon: He has my permission to run it.
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Matt U. wrote: I have no idea why I did not do that to begin with.
Happens when you're busy, working people tend to make mistakes from time to time. Good to hear that you already fixed it
Bastard Programmer from Hell
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Hi Guys,
I need to be able to format the text displayed by a CheckBox or RadioButton to show specific words within the text as bold, underline and/or italic. HTML would make this easy but I haven't been able to find any controls of this type that offer anything other than plain text properties.
Could anyone offer suggestions to solve this problem? I'm open to commercial component libraries (if they come with source) or to writing a custom component. If my only option is a custom component, a suggestion of an article/tutorial on the OnPaint method would be great.
Thanks...
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The standard button won't do this. If a quick search hasn't turned it up already, you may have to do it yourself. Custom painting a check box is a bit tricky because you still want the OS to draw the box for you, but not the label.
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When you say "format" are you describing something going on at run-time where someone using your application can change the color, font, style, etc. on-the-fly ?
"Beauty is in the eye of the beholder, and it may be necessary from time to time to give a stupid or misinformed beholder a black eye." Miss Piggy"
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No. I will be creating the component at run-time, populating the text and positioning the component on a form. I'm creating a questionnaire with a varying # of multiple choice answers. Some of the available answers will have words that are bolded, etc.
Example:
Q: Are you here?
A : Yes Always
B : No Sometimes
C : Not Sure
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Since you know the formatting of the questions in advance ... I'd consider:
1. possibly using a WebBrowser control
2. creating a UserControl (Luc beat me to it, as usual) that combines either an actual CheckBox, or a simulation of a CheckBox, with a RichTextControl.
3. doing some research here on CP (and StackOverFlow[^]) for WinForms controls that can render the subset of HTML you need (I do think there are some here on CP). And, naturally, Google[^].
best, Bill
"Beauty is in the eye of the beholder, and it may be necessary from time to time to give a stupid or misinformed beholder a black eye." Miss Piggy"
modified 28-Sep-11 10:53am.
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As a standard CheckBox/RadioButton won't do that, you need something else, maybe an aggregation of two existing Controls. How about a RadioButton-without-text and something (a Panel, a RichTextBox, a WebBrowser) where you get the text any way you want it?
The drawback now is it's click area will not cover your text. A possible remedy is to have a RadioButton-with-text where ForeColor equals BackColor, effectively hiding its text. The other control then needs to be click-through, which probably simply means disabled. Another possibility is you execute a RadioButton.PerformClick inside the Click handler of your text displaying Control.
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