Happy Codings - Programming Code Examples

Html Css Web Design Sample Codes

CPlusPlus Programming Sample Codes

JavaScript Programming Sample Codes

C Programming Sample Codes

CSharp Programming Sample Codes

Java Programming Sample Codes

Php Programming Sample Codes

Visual Basic Programming Sample Codes

Visual Basic Programming Code Examples

Visual Basic > Applications VBA Code Examples

Use drag and drop in a application



Use drag and drop in a application

'Drag and Drop within a application

Suppose you have a listbox with some elements and want to drag&drop a selected one into 
a textbox. I know there are easier ways to do this but it's just for making the point.

Make a form with a textbox (text1) and a listbox (list1). Fill the listbox with some items... 
Make a label (label1). Set it invisible = False

Put the next code at the appropiate places:

Sub List1_MouseDown (Button as Integer, Shift as Integer, X as Single, Y as Single)
    Dim DY

    DY = TextHeight("A")
    Label1.Move list1.Left, list1.Top + Y - DY / 2, list1.Width, DY
    Label1.Drag

End Sub

Sub List1_DragOver (Source as Control, X as Single, Y as Single, state as Integer)
    If state = 0 Then Source.MousePointer = 12
    If state = 1 Then Source.MousePointer = 0

End Sub

Sub Form_DragOver (Source as Control, X as Single, Y as Single, state as Integer)
    If state = 0 Then Source.MousePointer = 12
    If state = 1 Then Source.MousePointer = 0

End Sub

Sub Text1_DragDrop (Index as Integer, Source as Control, X as Single, Y as Single)
    text1.text = list1
   
End Sub

C++ Finding Transitive Closure of a Graph
Displaying the 'transitive closure matrix' of a graph. The reachability of a particular node 'i' towards all node pairs ('i','j') is known as the transitive closure of a graph. So this matrix is

C Code Find area of an equilateral triangle
C program code input side of an equilateral triangle from user and find area of the given triangle. How to find area of an equilateral triangle in C. Area of an equilateral triangle

C++ program for Complex Numbers using
Class for addition, subtraction, multiplication and division for 'complex numbers'. Class has 4 functions to perform arithmetic operations. It takes 2 "complex numbers" input from user

C program using of strtok() output words
Use of strtok() in C Programming Language. Skip lines shorter as. split string into tokens, return token array. Make sure, copy string to a safe place. Always keep the last entry NULL

Code Finds the Sum of 2 Binary Numbers
Take two Binary Numbers as input. Add each bits from the two binary numbers separately starting from LSB. The operations may be as follows. a) (0+0)=0, b) (1+0)=1, c) (1+1)=0 and

How to use Variable Types The C language
In Programming a Variable is a place holder for some value. All variables have some type associated with them, which expresses what 'type' of values they can be assigned. C offers

C Implement Priority Queue to Add Delete
Add the elements into the queue according to the order (ascending descending). Delete the elements. Function to create an empty priority queue. Function to insert value into

C Concats Two Strings without Use Library
We have to accept '2 Strings' from user using gets and we have to 'Concatenate' these two strings without using library functions. Inside the concate function we are firstly calculating