C# Signature:
[DllImport("user32.dll")]
static extern IntPtr CreatePopupMenu();
User-Defined Types:
None.
Notes:
None.
Tips & Tricks:
Please add some!
Sample Code:
[Guid("6B3A1F0C-C382-40d6-AA13-33B0AB46EEAA")]
public class BatchResultContextMenu: IShellExtInit, IContextMenu
{
#region Protected Members
protected const string guid = "{6B3A1F0C-C382-40d6-AA13-33B0AB46EEAA}";
protected string m_fileName;
protected uint m_hDrop = 0;
#endregion
#region IContextMenu
// IContextMenu
int IContextMenu.QueryContextMenu(uint hMenu, uint iMenu, int idCmdFirst, int idCmdLast, uint uFlags)
{
// Create the popup to insert
uint hmnuPopup = Helpers.CreatePopupMenu();
int id = 1;
if ( (uFlags & 0xf) == 0 || (uFlags & (uint)CMF.CMF_EXPLORE) != 0)
{
uint nselected = Helpers.DragQueryFile(m_hDrop, 0xffffffff, null, 0);
if (nselected == 1)
{
StringBuilder sb = new StringBuilder(1024);
Helpers.DragQueryFile(m_hDrop, 0, sb, sb.Capacity + 1);
m_fileName = sb.ToString();
// Populate the popup menu with file-specific items
id = PopulateMenu(hmnuPopup, idCmdFirst+ id);
}
// Add the popup to the context menu
MENUITEMINFO mii = new MENUITEMINFO();
mii.cbSize = 48;
mii.fMask = (uint) MIIM.TYPE | (uint)MIIM.STATE | (uint) MIIM.SUBMENU;
mii.hSubMenu = (int) hmnuPopup;
mii.fType = (uint) MF.STRING;
mii.dwTypeData = "Actions";
mii.fState = (uint) MF.ENABLED;
Helpers.InsertMenuItem(hMenu, (uint)iMenu, 1, ref mii);
// Add a separator
MENUITEMINFO sep = new MENUITEMINFO();
sep.cbSize = 48;
sep.fMask = (uint )MIIM.TYPE;
sep.fType = (uint) MF.SEPARATOR;
Helpers.InsertMenuItem(hMenu, iMenu+1, 1, ref sep);
}
return id;
}
void AddMenuItem(uint hMenu, string text, int id, uint position)
{
MENUITEMINFO mii = new MENUITEMINFO();
mii.cbSize = 48;
mii.fMask = (uint)MIIM.ID | (uint)MIIM.TYPE | (uint)MIIM.STATE;
mii.wID = id;
mii.fType = (uint)MF.STRING;
mii.dwTypeData = text;
mii.fState = (uint)MF.ENABLED;
Helpers.InsertMenuItem(hMenu, position, 1, ref mii);
}
int PopulateMenu(uint hMenu, int id)
{
// Grab some info about the file
bool done = ProcessBatchResults();
if (done)
{
AddMenuItem(hMenu, "Reschedule", id, 0);
AddMenuItem(hMenu, "Retry Now", ++id, 1);
AddMenuItem(hMenu, "Cancel", ++id, 2);
}
else
{
// Uses 100-baed values to distinguish on the "done" status
AddMenuItem(hMenu, "Commit", 100 + id, 0);
AddMenuItem(hMenu, "Rollback", 100 + (++id), 1);
}
return id++;
}
bool ProcessBatchResults()
{
FileInfo fi = new FileInfo(m_fileName);
return (fi.Length >0);
}
void IContextMenu.GetCommandString(int idCmd, uint uFlags, int pwReserved, StringBuilder commandString, int cchMax)
{
switch(uFlags)
{
case (uint)GCS.VERB:
commandString = new StringBuilder("...");
break;
case (uint)GCS.HELPTEXT:
commandString = new StringBuilder("...");
break;
}
}
void IContextMenu.InvokeCommand (IntPtr pici)
{
try
{
Type typINVOKECOMMANDINFO = Type.GetType("ShellExt.INVOKECOMMANDINFO");
INVOKECOMMANDINFO ici = (INVOKECOMMANDINFO)Marshal.PtrToStructure(pici, typINVOKECOMMANDINFO);
switch (ici.verb-1)
{
case 0:
RescheduleJob();
break;
case 1:
RetryNowJob();
break;
case 2:
CancelJob();
break;
case 100:
CommitJob();
break;
case 101:
RollbackJob();
break;
}
}
catch(Exception)
{
}
}
#endregion
#region IShellExtInit
int IShellExtInit.Initialize (IntPtr pidlFolder, IntPtr lpdobj, uint hKeyProgID)
{
try
{
if (lpdobj != (IntPtr)0)
{
// Get info about the directory
IDataObject dataObject = (IDataObject)Marshal.GetObjectForIUnknown(lpdobj);
FORMATETC fmt = new FORMATETC();
fmt.cfFormat = CLIPFORMAT.CF_HDROP;
fmt.ptd = 0;
fmt.dwAspect = DVASPECT.DVASPECT_CONTENT;
fmt.lindex = -1;
fmt.tymed = TYMED.TYMED_HGLOBAL;
STGMEDIUM medium = new STGMEDIUM();
dataObject.GetData(ref fmt, ref medium);
m_hDrop = medium.hGlobal;
}
}
catch(Exception)
{
}
return 0;
}
#endregion
#region Private Members
private void CancelJob()
{
MessageBox.Show("Gotta cancel the job", Path.GetFileName(m_fileName));
}
private void RescheduleJob()
{
MessageBox.Show("Gotta reschedule the job", Path.GetFileName(m_fileName));
}
private void RetryNowJob()
{
MessageBox.Show("Gotta retry the job NOW", Path.GetFileName(m_fileName));
}
private void CommitJob()
{
MessageBox.Show("Gotta commit the job", Path.GetFileName(m_fileName));
}
private void RollbackJob()
{
MessageBox.Show("Gotta rollback the job", Path.GetFileName(m_fileName));
}
#endregion
#region Registration
[System.Runtime.InteropServices.ComRegisterFunctionAttribute()]
public static void RegisterServer(String str1)
{
try
{
// For Winnt set me as an approved shellex
RegistryKey root;
RegistryKey rk;
root = Registry.LocalMachine;
rk = root.OpenSubKey("Software\\Microsoft\\Windows\\CurrentVersion\\Shell Extensions\\Approved", true);
rk.SetValue(guid.ToString(), "BatchResults shell extension");
rk.Close();
// Set "Folder\\shellex\\ContextMenuHandlers\\BatchResults" regkey to my guid
root = Registry.ClassesRoot;
rk = root.CreateSubKey("POPUPTEST\\shellex\\ContextMenuHandlers\\BatchResults");
rk.SetValue("", guid.ToString());
rk.Close();
}
catch(Exception e)
{
System.Console.WriteLine(e.ToString());
}
}
[System.Runtime.InteropServices.ComUnregisterFunctionAttribute()]
public static void UnregisterServer(String str1)
{
try
{
RegistryKey root;
RegistryKey rk;
// Remove ShellExtenstions registration
root = Registry.LocalMachine;
rk = root.OpenSubKey("Software\\Microsoft\\Windows\\CurrentVersion\\Shell Extensions\\Approved", true);
rk.DeleteValue(guid);
rk.Close();
// Delete regkey
root = Registry.ClassesRoot;
root.DeleteSubKey("POPUPTEST\\shellex\\ContextMenuHandlers\\BatchResults");
}
catch(Exception e)
{
System.Console.WriteLine(e.ToString());
}
}
#endregion
}
public class Helpers
{
public const uint WM_DRAWITEM = 0x002b;
public const uint WM_MEASUREITEM = 0x002c;
[DllImport("shell32")]
internal static extern uint DragQueryFile(uint hDrop, uint iFile, StringBuilder buffer, int cch);
[DllImport("user32")]
internal static extern HMenu CreatePopupMenu();
[DllImport("user32")]
internal static extern bool InsertMenuItem(HMenu hmenu, uint uposition, uint uflags, ref MENUITEMINFO mii);
[DllImport("user32")]
internal static extern bool AppendMenu(HMenu hmenu, MFMENU uflags, IntPtr uIDNewItemOrSubmenu, string text);
[DllImport("user32")]
internal static extern bool InsertMenu(HMenu hmenu, int position, MFMENU uflags, IntPtr uIDNewItemOrSubmenu, string text);
[DllImport("user32")]
internal static extern int SetMenuItemBitmaps(HMenu hmenu, int nPosition, MFMENU uflags, IntPtr hBitmapUnchecked, IntPtr hBitmapChecked);
}
