P/Invoking C++ callback functions crashes when .NET application is not in focus
A C++ DLL exports one function having its only parameter as a pointer to another function: #define AFX_EXT_CLASS __declspec(dllexport)typedef void
Read more.NET Framework
Form.Show() and Form.ShowDialog()
Form.Show() is an asynchronous call. Subsequent section of codes will run while the form is being loaded. Form.ShowDialog() is a
Read moreConfiguring Visual Studio to Debug .NET Framework Source Code
1. Install the Visual Studio 2008 QFE. Note this functionality is not available on the Express versions of the Visual
Read moreValidate text using RegEx
‘Email address: Regex.IsMatch(Me.txtEmail.Text, “w+([-+.’]w+)*@w+([-.]w+)*.w+([-.]w+)*”) ‘Alpha-numeric (no space): Regex.IsMatch(Me.txtUsername.Text, “^[0-9a-zA-Z]+$”) ‘Alpha-numeric with space, at least 5 chars:Regex.IsMatch(Me.txtUsername.Text, “[0-9a-zA-Z’ ‘]{5,} )
Read moreApplication.DoEvents and MessageBox
If the user clicks ‘Yes’, the following will close the messagebox first before doing any other thing. Private Sub TestMsgBox()
Read moreAllow only digits in textbox
The following code apply ES_NUMBER to allow only digits to be typed into the edit control. Public Const GWL_STYLE As
Read moreVB.NET With statement
The following code will run flawlessly but at the end, Obj will still contain the assigned properties (.prop1 = 0
Read moreHow to get path of the current system’s temporary folder using .NET
Temporary folders are useful to store simple logs during execution of the program. It is also used for storing the
Read moreHow to disable WebBrowser control’s ‘click sound’
Depending on system preferences (in Control Panel/Sounds), the .NET WebBrowser control (just like Internet Explorer) may produce a click sound
Read moreXML Serializable Dictionary in .NET
For some reason, the generic Dictionary in .NET 2.0 is not XML serializable. The following code snippet is a XML
Read moreMake a .NET application run at startup
Only applicable to .Net desktop application. For .NET compact framework application, use SHCreateShortcut and creates a shortcut in WindowsStartup folder.
Read moreToggle Button in .NET
Ever wondered how to create a button which toggles it’s state in C# windows Forms? It used to exist in
Read moreLate-binding in .NET
Early-binding: Variable types are defined at compile time (e.g. string, integers): String st = “hello world”;Boolean ok = st.Contains(“hello”); The
Read moreTrustFailure exception during HTTPWebRequest via HTTPS connection
If an HTTPWebRequest is made via a secure connection (HTTPS) and the certificate is not trusted, a WebException with Exception.Status
Read moreSerializing/De-serializing an ArrayList
Declarations: ‘Type of each element in the ArrayListPublic Structure ArrayListEntry…End Structure ‘ArrayList containing elements of above typePublic myArrayList As New
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