Question: What is the difference between Microsoft Exchange and Outlook? We only use Exchange on our workstations, but I have an icon on my desktop for Outlook. Please explain. Answer:
Whenever the system time or the display resolution changes, Windows sends all the top-level windows (forms, in VB jargon) the WM_TIMECHANGE or WM_DISPLAYCHANGE message, respectively. Therefore, you can easily determine
When you right-click a TextBox control, Windows sends it a WM_CONTEXTMENU message, to which VB reacts by displaying the default Edit popup menu, that contains editing commands such as Cut,
The Paint event doesn’t provide with information about which region of the form must be actually repainted, and therefore forces the programmer to repaint the entire client area, which in
VB forms exposes the Activate and Deactivate events, which fire when the form gets and loses the focus because the user has clicked on another form of the same application.
When the user resizes a form with the mouse or the keyboard, or maximizes it, Windows sends the form a WM_GETMINMAXINFO message, with lParam pointing to a MINMAXINFO structure that
When the user scrolls the contents of a TextBox control – either by clicking on the companion scrollbars or by typing new characters in the edit area – the TextBox
‘ arc sine’ error if value is outside the range [-1,1]Function ASin(value As Double) As Double If Abs(value) 1 Then ASin = Atn(value / Sqr(1 – value * value)) Else
‘ hyperbolic sineFunction SinH(value As Double) As Double Dim temp As Double temp = Exp(value) SinH = (temp – 1 / temp) / 2End Function’ hyperbolic cosineFunction CosH(value As Double)