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Arrow keys do not raise KeyDown in a WinForm because the form swallows them. Override ProcessCmdKey to catch them.
Public Class Form1
Protected Overrides Function ProcessCmdKey(ByRef msg As Message, ByVal keydata As Keys) As Boolean
If keydata = Keys.Right Then
PictureBox1.Left += 10
End If
Download a file in a Windows Store app with BackgroundDownloader and async/await in C#.
async Task<bool> DownloadFile(Uri source, StorageFile destination)
{
try
{
BackgroundDownloader downloader = new BackgroundDownloader();
DownloadOperation download =An async C# method that checks a URL is well formed and that the server answers, using a HEAD request.
private async Task<bool> UriExists(string url)
{
try
{
// Validate whether url has a valid uri pattern
if (!Uri.IsWellFormedUriString(url, UriKind.RelativeOrAbsolute))Three ways to set a tooltip on a control in a Windows Store app: the Properties window, XAML and code behind.
ToolTip textUriTip = new ToolTip();
textUriTip.Content = "New ToolTip";
ToolTipService.SetToolTip(usr, textUriTip);Windows Store apps have no config file. Use ApplicationData.Current.LocalSettings to save and read app settings in C#.
using Windows.Storage;
bool SaveSettings(string key, string value)
{
try
{What you need to start building Windows 8 Store apps: Windows 8, Visual Studio 2012 and a developer licence, plus a dual boot setup.
The prerequisites and the four phases of installing SharePoint 2013 on a single server.
Two ways to start a C# application automatically at Windows startup: the Startup folder or a Run registry key.
private void RegisterStartupApplication()
{
RegistryKey regKey = Registry.CurrentUser.OpenSubKey
("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run", true);
regKey.SetValue("MyApplicationsName", Application.ExecutablePath);
}Minimise all windows from C#, the same as clicking Show Desktop on the taskbar, using the Shell32 COM library.
Shell32.ShellClass shell = new Shell32.ShellClass();
shell.MinimizeAll();