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
If you heavily use API calls and strictly follow the SDK documentation, you might be tempted to use the GetLastError API to retrieve the error returned by your last API
You can alter the size of the caret (this is the name of the cursor within text boxes, not to be confused with the mouse cursor), for instance to ease
Private Type OSVERSIONINFO dwOSVersionInfoSize As Long dwMajorVersion As Long dwMinorVersion As Long dwBuildNumber As Long dwPlatformId As Long szCSDVersion As String * 128End TypePrivate Declare Function GetVersionEx Lib “kernel32” Alias
If you’re writing an ActiveX control, you can create properties that return an enumerated value, as in: Public Enum SizeConstants SizSmall = 1 SizMedium SizLargeEnd EnumPublic Size As SizeConstants When
Every now and then I see DefInt or DefLng directives spread over Visual Basic code modules, whose intended purpose is to revert the default data type from Variant to Integer
Variants are the default type of variables that are declared without an As clause, as in: Dim name ‘ this is a variant or are not declared at all (which
When you need to learn if a field has been changed by the user, you have at least three options: you can use a global boolean variable and set it