Computer hints

I'll try to gather a big part of my PC hints here!

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Dictionary class extensions (CopyTo, Sort) (C#)

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It seems that are not any CopyTo and Sort functions in the Dictionary class that resides in the Systems.Collection.Generic namespace. The OrderBy extension method used by Linq is not very practical to me, because it does not return a dictionary object. Here is my extension method CopyTo, applicable to generic Dictionary objects, allowing to define a part of the dictionary: public static void CopyTo<T, V>(this Dictionary<T, V> source, Dictionary<T, V> target) { if (target == null) target = new Dictionary<T, V>(); foreach (KeyValuePair<T, V> entry in source) target.Add(entry.Key, entry.Value); } public static void CopyTo<T, V>(this Dictionary<T, V> source, Dictionary<T, V> target, int start) { if (target == null) target = new Dictionary<T, V>(); int iEntry = 0; foreach (KeyValuePair<T, V> entry in source) { if (iEntry++ >= start) target.Add(entry.Key, entry.Value); } } public static void CopyTo<T, V>(this Dicti...
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Change the size of a shape in Powerpoint 2007 using VBA

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Automation in Powerpoint 2007 is not so easy as it seems, because the macro recording is not available any more. What I wanted to do is to change the shape of some graphs to have a specific size and location. The following code changes the size and location of the current shape according to our preferences. Public Sub ChangeImage() With ActiveWindow.Selection.ShapeRange(1) .LockAspectRatio = msoFalse .Width = 720 .Height = 153.9213 .Top = 77.8604 .Left = 0 ' optional '.ZOrder msoSendToBack End With End Sub Public Sub PrintInfo() Debug.Print vbCrLf & "Public Sub ChangeImage()" Debug.Print vbTab & "With ActiveWindow.Selection.ShapeRange(1)" With ActiveWindow.Selection.ShapeRange(1) Debug.Print vbTab & vbTab & ".LockAspectRatio = msoFalse" Debug.Print vbTab & vbTab & ".Width = " & Str(.Width) Debug.Print vbTab & vbTab & ".Heigh...
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Calling Fortran intrinsic functions from Visual Basic

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There is a great way to call the Fortran intrinsic libraries from Visual Basic, without wrapping them to dynamic libraries. I have the Digital Fortran installed on my computer, so I found out one of the running DLLs which is the dforrt.dll and that contains the Fortran intrinsic libraries (which are used by the Digital compiler). I simply opened the DLL with the Depends program and I found out the name of the functions that are declared in the DLL file. Knowing that the tangent function is declared as DTAN in Fortran, I found out some functions and declared them in a Visual Basic module file like this: Public Declare Function DTAN# Lib "dforrt.dll" Alias "_FXDTAN" (x#) Public Declare Function DTAN5# Lib "dforrt.dll" Alias "_FXIDTAN" (x#) And here is a sample call: Const PI As Double = 3.14159265358979 'the tangent of PI/4 will return 1.0 Debug.Print DTAN(PI / 4) Of course the tangent function is an intrinsic one in Visual Basic. H...
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