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Hello... I have three textboxes on a form. The first two are for entering numbers for addition. And the third is for displaying the result of addition. I want the result of addition to appear in the third textbox as soon as I enter the numbers in the first two …

I'm trying to determine the minimum range of floating-point types. It's easy when using values from standard headers: [CODE]#include <stdio.h> #include <float.h> main() { printf("Minimum range of float variable: %e\n", FLT_MIN); printf("Minimum range of double variable: %e\n", DBL_MIN); return 0; } [/CODE] This code gives the following output: Minimum range …

Hello. I'm learning C with "The C Programming Language" book, and I'm trying to solve exercise 1.13: "Write a program to print a histogram of the lengths of words in its input. It is easy to draw the histogram with the bars horizontal; a vertical orientation is more challenging." I …

Hello... I'm learning C with "The C Programming Language" book, and I'm stuck at exercise 1-10 which asks to: "Write a program to copy its input to its output, replacing each tab by \t, each backspace by \b, and each backslash by \\. This makes tabs and backspaces visible in …

Hello... I'm learning win32 api programming, and I can't figure out how the vsprintf (va_list, va_start, va_end) function works in the following code: [CODE]/*----------------------------------------------------- SCRNSIZE.C -- Displays screen size in a message box (c) Charles Petzold, 1998 -----------------------------------------------------*/ #include <windows.h> #include <tchar.h> #include <stdio.h> int CDECL MessageBoxPrintf (TCHAR * szCaption, …

Hello... I am learning assembly, and am reading "The Art of Assembly" book. I'm on chapter 4, and I can't figure out where is the error in the following code: "The last problem with pointers is the lack of type-safe access. This can occur because HLA cannot and does not …

Hello... I want to change the TextBox border color if certain event is true. For example, in a GroupBox, there is a TextBox and a Button. If the TextBox is empty, and I click the button, I want the TextBox border color to change to red. If the TextBox is …

How can I prevent the beep sound when I use the SendKey command in NumericUpDown1 Box? Here is the code: [CODE] Private Sub NumericUpDown1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles NumericUpDown1.KeyPress Static SAME As Short = TB2 TB1 = SAME - NumericUpDown1.Value If e.KeyChar >= "0" And e.KeyChar …

Hello... I want to draw three straight lines on a form. Can you tell me if the following code is correct: [CODE]Private Sub Form1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint Dim Line1 As System.Drawing.Graphics Dim PenLine As New System.Drawing.Pen(System.Drawing.Color.Black) Line1 = Me.CreateGraphics Line1.DrawLine(PenLine, 0, 129, 529, 129) …