The Tag property exposed by many Windows Common Controls (including TreeView’s Node objects and ListView’s ListItem objects) is more versatile than the ListBox and ComboBox controls’ ItemData property, because it
Any action that affects a form’s size or position should be inhibited when the form is minimized or maximized, because this causes a runtime error 384. Always double check your
At times it might be convenient to know how a given control got the focus, namely by means of the Tab key, an associated hotkey or a click of the
Visual Basic lets you test the state of mouse buttons only inside a MouseDown, MouseMove, or MouseUp event procedure. To determine the current state of mouse buttons you can use
Private Declare Function GetComputerName Lib “kernel32” Alias _ “GetComputerNameA” (ByVal lpBuffer As String, nSize As Long) As Long’ Returns the name of the computer.Function ComputerName() As String Dim buffer As
It is highly unfortunate that Visual Basic doesn’t offer a way to execute a group of statements only when the program is interpreted in the environment or only when it
Private Declare Function GetVersion Lib “kernel32” () As Long’ Returns True is executed under Windows NT,’ False if executed under Windows 95/98Function IsWindowsNT() As Boolean IsWindowsNT = (GetVersion() And &H80000000)
Visual Basic lets you test the state of the Shift, Alt and Ctrl keys only within the KeyUp, KeyDown and all the mouse-related event procedures. If you want to test
Private Declare Sub CopyMemory Lib “kernel32” Alias “RtlMoveMemory” (dest As _ Any, source As Any, ByVal bytes As Long)’ Return the low word of a Long valueFunction LowWord(ByVal value As