If a file is in use, the handle return is invalid. prettyprint 复制 [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)] private static extern SafeFileHandle CreateFile(string lpFileName, FileSystemRights dwDesiredAccess, FileShare dwShareMode, IntPtr securityAttrs, FileM...
Public Class Form1 Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click GetSheetName("D:\Student.xlsx") End Sub Public Sub GetSheetName(ByVal filepath As String) ListBox1.Items.Clear() Dim numberSheetID As Integer = 1 Dim strSheetName As String = Nothing ...
Hi, I'm not sure how I would use Process.GetProcessesByName() to check if a process is running, and if it isn't start it, using VB.NET? I know how to start a process using Process.Start().Help?Thanks AaronAll replies (3)
End Using Return False Catch ex As IOException Return True End Try End Function Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click If FileInUse("F:\test.docx") = True Then MsgBox("file is open you can't use it") Exit Sub End If MsgBox("file is clos...
Dim StrList() As String = {"abc", "qwe", "zxc"} Dim chkStr As String = "ABC" If Array.Find(StrList, Function(x) x.ToLower = chkStr.tolower) IsNot Nothing Then MsgBox("Item Exists") Else MsgBox("Item Not Exists") End If thanks...
Checking if an object is not nothing Checking printer status in vb.net Checksum calculation in vb.net Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)) when installed on different PC Class not registered exception in vb.net Clear Form Button clearing data from datagr...
if you want to check for specific antivirus, you can check it through registry key below. HKLM\Software\Microsoft\Windows\CurrentVersion\UninstallTo do it the same way as windows security center, you have to use WMI to query the SecurityCenter. **root\SecurityCenter **or from registry HKEY...
One, it errors if Excel is not open. And two, it does not check multiple instances of Excel; it's random which instance it will select. I have tried using the System Process commands to run through all processes but that seems to just get me locked in an infinite loop....
If CurrentTime.TimeOfDay.Ticks >= t2.Ticks And CurrentTime.TimeOfDay.Ticks <= t1.Ticks ThenMessageBox.Show("Time is within range.")End IFThe above code id not working please check this data. for example:t1 = #7:20:15 PM# t2 = #2:25:25 AM#Current time = #8:27 PM#...
If TextBox1.Text.Trim <> "" Then 'Do something End If If you say it can`t be done then i`ll try itTuesday, January 27, 2015 11:25 PM ✅AnsweredDo you mean you want to check if the TextBox is not empty but contains nothing but spaces? If so, I think you are right to us...