This was a killer i saw it in the MSDN libraries and they went to much deep into it but there is an easier way…it works better. In Visual basic 5.0 or 6.0 you cann’ot sort by date in the listview. The problem is that when a value is entered in the cell, the control treats it as… Read More »
Joining strings together, or concatentation, can take a toll on performance. Especially in a long loop. Here is a method to increase performance by 20x. Sub Concat(Dest As String, Source As String)’First Dest must have one space more’Example : Dest = ‘Hello ”and not Dest = ‘Hello’ Dim string1 As Long Dim string2 As Long string1 = Len(Dest) string2 = Len(Source)… Read More »
I have read many accounts in various books and articles about how it would be nice to be able to return an error code with every function return. It’s fairly easy to achieve this. Simply create a User-Defined-Type (or class) called tReturn (or whatever) in a global module (assuming the use of a UDT). ‘———————————————Type tReturn Value as… Read More »
Just like the title says, the code in the attached file will validate the floating point numbers in a text box. Usage Create a form with a textbox, and insert the following into the form code: Private Sub Form_Load() Text1.Text = Empty End Sub Private Sub Text1_KeyPress(KeyAscii As Integer) ‘ Precision is 2 in this case ‘ Send the… Read More »
Remove any record from an array, without leaving a gap in the records. Option Explicit Private Type my_type field1 As String field2 As Long field3 As IntegerEnd Type Const MAX_ARRAY = 10Dim my_array(0 To MAX_ARRAY – 1) As my_type ‘Delete the record RecPos (from 0 to MaxRecs)…MaxRecs is the maximum array dimensionPublic Sub DeleteRecordFromMyArray(RecPos As Integer, MaxRecs As Integer) Dim i As… Read More »
Calculate the time elapsed between two dates. Option ExplicitPublic Function ElapsedTime(tStart, tStop) As String’ *******************************************************************’ Function Name : ElapsedTime *’ Created By : Herry Hariry Amin *’ Email : h2arr@cbn.net.id *’ Language : VB4, VB5, VB6 *’ Example : sYourVariable = ElapsedTime(tStartTime,tStopTime) *’ ******************************************************************* Dim dtr, dtl, jml As Long dtl = (Hour(tStart) * 3600) + (Minute(tStart) *… Read More »
This handy little function will determine if a value is present in an array, and return true or false. Option Explicit Public Function IsInArray(FindValue As Variant, arrSearch As Variant) As Boolean On Error GoTo LocalError If Not IsArray(arrSearch) Then Exit Function If Not IsNumeric(FindValue) Then FindValue = UCase(FindValue) IsInArray = InStr(1, vbNullChar & Join(arrSearch, vbNullChar) & vbNullChar, _vbNullChar & FindValue & vbNullChar)… Read More »
This is a very simple way to get just the full directory path of a file passed in. Public Function GetTheFilePath(ByVal strFile) As String Files = Split(strFile, “\”) For I = 0 to (UBound(Files) – 1) FilePath = FilePath & Files(I) & “\” Next GetTheFilePath = FilePathEnd Function Usage MyFilePath = GetTheFilePath(“C:\testing\jim\file.txt”) will return: C:\testing\jim\
Ever wonder how to return multiple files using the CommonDialog control? Here is a short demonstration of how to get it done. Private Sub cmdOpen_Click() Dim sFileNames() As String Dim iCount As Integer cd.Filter = “All Files|*.*” cd.Flags = cdlOFNAllowMultiselect cd.ShowOpen If cd.FileName <> “” Then sFileNames = Split(cd.FileName, Chr(32)) For iCount = LBound(sFileNames) To UBound(sFileNames) MsgBox sFileNames(iCount), vbInformation Next End IfEnd Sub
Just a little something to help you do math in different numbering systems. Option Explicit ‘Convert a decimal number in another basePublic Function CBase(ByVal number As Long, ByVal base As Long) As String ‘symbols to code the number Const chars = “0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ” Dim r As Long ‘verify if there are enought symbols to code the number in the selected base If base… Read More »