C#

[DllImport("gdi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
internal static extern int GetCharacterPlacementW(IntPtr dev, string text, int count, 
                           int max, [In, Out] ref GCP_RESULTS results, GcpFlags flags);

[Flags]
internal enum GcpFlags // Win32: GCP_xxx flags, WinGDI.h
{
    DBCS = 0x00000001,
    ReOrder = 0x00000002,
    UseKerning = 0x00000008,
    GlyphShape = 0x00000010,
    Ligate = 0x00000020,
    Diacritic = 0x00000100,
    Kashida = 0x00000400,
    Error = 0x00008000,
    Justify = 0x00010000,
    FliGlyphs = 0x00040000,
    ClassIn = 0x00080000,
    MaxExtent = 0x00100000,
    JustifyIn = 0x00200000,
    DisplayZWG = 0x00400000,
    SymSwapOff = 0x00800000,
    NumericOverride = 0x01000000,
    NeutralOverride = 0x02000000,
    NumericsLatin = 0x04000000,
    NumericsLocal = 0x08000000,

    FliMask = 0x0000103B
}

[StructLayout(LayoutKind.Sequential)]
internal struct GCP_RESULTS
{
    internal int lStructSize;
    [MarshalAs(UnmanagedType.LPTStr)]
    internal string lpOutString;
    internal IntPtr lpOrder;
    internal IntPtr lpDx;
    internal IntPtr lpCaretPos;
    internal IntPtr lpClass;
    internal IntPtr lpGlyphs;
    internal int nGlyphs;
    internal int nMaxFit;
}

tobriain wrote:

I have to implement an interface defined in an external program. The deal is that I have a method Notify() in my object that implements that interface, and that when there's an update, that method is called. I can then collect any updates with a method call that returns a System.Array consisting of an ID (given by me when implementing the connection), and a value. There'll be at least 20 different IDs, and the events will be unsorted in the array. I have to either update variables in the 20 objects (maybe stored in some kind of collection with the ID) or define 20 events, and store them in some sort of list for hashing.

tobriain wrote:

Can I test for the speed of some of the ideas I have for the design (i don't now too much about the details of some of the objects I could use)?

public MyObject
{
    objectList = List<List<UpdateableObject>>();
 
    objectList.Add(new List<UpdateableObject>());
    objectList[0].Add(new UpdateableObject()); // ID: 0
    objectList[0].Add(new UpdateableObject()); // ID: 0
 
    objectList.Add(new List<UpdateableObject>());
    objectList[1].Add(new UpdateableObject()); // ID: 1
    objectList[1].Add(new UpdateableObject()); // ID: 1
 
    // And so on...
}
  
public void Notify()
{
    Update[] updates = GetUpdates();
 
    for(int i = 0; i < updates.Length; i++)
    {
        if(updates[i].ID == 0)
        {
            foreach(UpdateableObject obj in objectList[0])
            {
                obj.Value = updates[i].Value;
            }
        }
        else if(updates[i].ID == 1)
        {
            foreach(UpdateableObject obj in objectList[1])
            {
                obj.Value = updates[i].Value;
            }
        }
    }
}

Giorgi Dalakishvili wrote:

As far as I know an icon cannot be specified from a managed dll/exe

Mark F. wrote:

Executables (.exe,.dll) can have many icons (e.g., shell32.dll). In an registry association you pick one using the icon's position.

For example: C:\Windows\System32\shell32.dll,2