Change Windows Mobile 5 Theme via C#

Question

I'm trying to find a way to change the theme of a Windows Mobile 5 device from within my software. Does anyone have any experience in this area?

Dylan

Answer 1

You can set the relevant registry entries and then do a SendMessage to refresh the today screen.

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• HKEY_CURRENT_USER\Software\Microsoft\Today\Skin
• HKEY_CURRENT_USER\Software\Microsoft\Today\UseStartImage
• All values under HKEY_CURRENT_USER\Software\Microsoft\Today\(ThemeFileName)
• HKEY_LOCAL_MACHINE\Software\Microsoft\Color\SHColor
• HKEY_LOCAL_MACHINE\Software\Microsoft\Color\BaseHue
• All values under HKEY_LOCAL_MACHINE\Software\Microsoft\Color\(ColorNumber)
• HKEY_LOCAL_MACHINE\System\GWE\SysColor

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C# code example:

using System.Runtime.InteropServices;
using Microsoft.Win32;
...
[DllImport("coredll.dll")]
private static extern int SendMessage(IntPtr hWnd, uint msg, int wParam, int lParam);
...
public const int HWND_BROADCAST = 0xffff;
public const int WM_WININICHANGE = 0x001A;

// Copy wallpaper file to windows directory
File.Copy(@"\My Documents\My Pictures\ImageFileName.jpg", @"\Windows\stwater_240_240.jpg", true);                

// Update registry
Registry.SetValue(@"HKEY_CURRENT_USER\Software\Microsoft\Today", "Wall", "ImageFileName");

// Send message to refresh today screen
SendMessage((IntPtr)HWND_BROADCAST, WM_WININICHANGE, 0xF2, 0);

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See more details at:

http://windowsmobiledn.com/qa-how-to-install-a-today-theme-file/

http://windowsmobiledn.com/forum/viewtopic.php?t=335

http://social.msdn.microsoft.com/Forums/en-US/vssmartdevicesnative/thread/83a0420b-1c8f-4201-b910-693b3b9a3b12