One of my biggest needs that i find myself looking for is icons for other applications. So I have made a little program that will traverse the local registry and load all of the extensions into a listbox. When a selection is made if there is an icon for the selected extension it will display in a pictureBox along with some other important attributes.
There is a save icon button that does not save the icon properly; however, I will be updating this code over the next two weeks to take care of that problem.
If anyone right off hand knows how to save an icon by using the built-in Icon.Save method please let me know.
--Here is a quick glance of the GetIcon method-- The rest of the code is packed neatly in the link provided..
----GetIcon
----Win32---->
[DllImport("shell32.dll")]
extern static IntPtr ExtractIcon(IntPtr hInst, string lpszExeFileName, int nIconIndex);
//If the function succeeds, the return value is nonzero.
//If the function fails, the return value is zero.
[DllImport("user32.dll")]
extern static bool DestroyIcon(IntPtr hIcon);
<----
private void GetIcon()
{
this.txBxDllExePath.Text = string.Empty;
this.txBxIconIndex.Text = string.Empty;
string strIconPath = string.Empty;//Path to the .dll or .exe
int nIcon = 0; //The icon number (index) within a file
IntPtr hIcon = IntPtr.Zero; //The "Icon Handle" for the default icon
RegistryKey regKeyExt = null;
object regKeyExt_Val = null;
RegistryKey regKeyExtEx = null;
RegistryKey regKeyDefaultIcon = null;
object oIconPath = null;
string[] path_IconNum = null;
Icon theIcon = null;
bool icoDestroy = false;
try
{
//1.
regKeyExt = Registry.ClassesRoot.OpenSubKey(this.txBxIconFile.Text != string.Empty ? this.txBxIconFile.Text : ".txt");
regKeyExt_Val = regKeyExt.GetValue(string.Empty);//GetValue by empty string returns the (Default) Value
//------------------------------
//2.
regKeyExtEx = Registry.ClassesRoot.OpenSubKey(regKeyExt_Val.ToString());
regKeyDefaultIcon = regKeyExtEx.OpenSubKey("DefaultIcon");
//Example:
//%SystemRoot%\system32\shell32.dll,-152
oIconPath = regKeyDefaultIcon.GetValue(string.Empty);
//Split the Path and Icon
path_IconNum = oIconPath.ToString().Split(',');
//Get icon Path from string array
strIconPath = path_IconNum[0]; this.txBxDllExePath.Text = path_IconNum[0];
//Get icon Number from string array
if (int.TryParse(path_IconNum[1], out nIcon))
{
//Display Icon Index (Index inside the .dll or .exe which it resides)
this.txBxIconIndex.Text = nIcon.ToString();
//------------------------------
//3.
//Win32
//Extract the icon handle
hIcon = ExtractIcon(Process.GetCurrentProcess().Handle, strIconPath, nIcon);
//Get icon form .dll or .exe
if (hIcon == IntPtr.Zero) return;
theIcon = Icon.FromHandle(hIcon);
if (theIcon == null)
{
//Win32
icoDestroy = DestroyIcon(hIcon);
goto cleanUp;
}
this.pbIcon.Image = theIcon.ToBitmap();
this.Icon = theIcon;
//Win32
icoDestroy = DestroyIcon(hIcon);
}
}
catch (Exception ex)
{
this.Icon = Properties.Resources.zoom_in_copy;
this.pbIcon.Image = Properties.Resources.zoom_in_copy.ToBitmap();
this.txBxIconFile.Text = string.Empty;
MessageBox.Show(ex.Message);
}
cleanUp:
{
strIconPath = string.Empty;//Path to the .dll or .exe
nIcon = 0; //The icon number (index) within a file
hIcon = IntPtr.Zero; //The "Icon Handle" for the default icon
regKeyExt_Val = null;
if (regKeyExtEx != null) regKeyExtEx.Close();
if (regKeyDefaultIcon != null) regKeyDefaultIcon.Close();
if (regKeyExt != null) regKeyExt.Close();
if (theIcon != null) theIcon.Dispose();
//Win32
if (!icoDestroy)
icoDestroy = DestroyIcon(hIcon);
oIconPath = null;
theIcon = null;
}
}
-----------------------
http://www.eggheadcafe.com/fileupload/215296388_Get-Default-Icons[0].zip