This document contains code snippets related to capturing images and video using the camera on a device, accessing files, reading and writing streams of data, and implementing COM interfaces. It includes code for initializing camera capture, handling image capture events, reading and writing protected bytes, and defining a COM interface and class.

6. DllImport "avicap32.dll" "capCreateCaptureWindow"
static extern int
string int
int int int int
int int
DllImport "avicap32.dll"
static extern bool
int
MarshalAs UnmanagedType ref string
int
MarshalAs UnmanagedType ref string
int
// more and more of the same

8. using Windows.Media.Capture;
var new CameraCaptureUI
new Size
var await CameraCaptureUIMode
if
var new BitmapImage
await FileAccessMode

15. demo

20. demo

21. var new CameraCaptureUI
new Size
var await CameraCaptureUIMode
if
var new BitmapImage
await FileAccessMode

22. var DataTransferManager.GetForCurrentView
new TypedEventHandler<DataTransferManager
DataRequestedEventArgs
void
if null
"No Image Taken"
else

25. try
{
var new CameraCaptureUI
new Size
catch (Exception e)
{
//Exception handling code
}
ComException

26. var picker = new FileOpenPicker();
picker.FileTypeFilter.Add("*");
var files = await picker.PickMultipleFilesAsync();
foreach (var file in files)
{
lbFiles.Items.Add(file.FileName);
}
PickMultipleFilesOperation PickMultipleFilesAsync();
public sealed class PickMultipleFilesOperation :
IAsyncOperation<IReadOnlyList<StorageFile>>, IAsyncInfo

27. var picker = new FileOpenPicker();
picker.FileTypeFilter.Add("*");
var files = await picker.PickMultipleFilesAsync();
foreach (StorageFile file in files)
{
lbFiles.Items.Add(file.FileName);
}
System.Collections.Generic.IReadOnlyList
<Windows.Storage.StorageFile>

28. var picker = new FileOpenPicker();
picker.FileTypeFilter.Add("*");
var files = await picker.PickMultipleFilesAsync();
foreach (StorageFile file in files)
{
lbFiles.Items.Add(file.FileName);
}
System.Collections.Generic.IReadOnlyList
Windows.Foundation.Collections.IVectorView
<Windows.Storage.StorageFile>
<Windows.Storage.StorageFile>

31. FileOpenPicker picker = new FileOpenPicker();
picker.FileTypeFilter.Add("*");
StorageFile file = await picker.PickSingleFileAsync();
Windows.Storage.Streams.IInputStream inputStream =
await file.OpenForReadAsync();
System.IO.Stream stream = inputStream.AsStream();
System.IO.StreamReader reader = new StreamReader(stream);
string contents = reader.ReadToEnd();

32. internal async void ProtectBytes(byte[] data, BinaryWriter output)
{
DataProtectionProvider dpp = new DataProtectionProvider();
IBuffer result = await dpp.ProtectAsync(data.AsBuffer());
byte[] protectedData;
int start = 0;
if (result.TryGetUnderlyingData(out protectedData, out start))
output.Write(protectedData);
else
throw new InvalidOperationException();
}

34. ComVisible(true), Guid("06D7901C-9045-4241-B8A0-39A1AC0F8618")]
public interface IWindowsApiSample
{
string HelloWorld();
}
[ComVisible(true), [ClassInterface(ClassInterfaceType.None)]
[ComDefaultInterface(typeof(IWindowsApiSample))]
public class WindowsApiSample : IWindowsApiSample
{
public string HelloWorld() {
return "Hello, World!";
}
}

35. public sealed class MyClassLibrary
{
public string HelloWorld()
{
return "Hello, World!";
}
}

40. demo

43. var
var

47. demo

50. demo