visual c++ code to read number of characters in the string entered in a text box

[Member 10715106]

im using visual studio 2010.im new to this.i have a button and a text box. i want to enter a string in the text box.eg:"hello". and if i click the button it should count the number of characters in the string and return the value..eg: in this case "hello" ,when i click the button it should count each letter and display the value "5"(string "hello" contains 5 characters).can any1 help me by sending the exact code?

[David Crow]

Have you looked at the WM_GETTEXTLENGTH message? If you are using MFC, check out GetWindowTextLength().

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[Munchies_Matt]

He has to handle WM_COMMAND first.... then the button ID..... then get the window handle to the edit control.... This guy needs to go back and start form scratch and read some books/do some tutorials on Win32/MFC.

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[leon de boer]

Ok here is a skeleton program it does a bit more than you asked it deals with resizing the window, closing etc and is really complete enough for you to build on and get the idea.

#include
#include

// These are ID's to call the controls by as you add new controls you add new entries
#define IDC_TEXT 100 // Edit box ID
#define IDC_BUTTON 101 // Button ID
#define IDC_ANSWER 102 // Static text box to show answer

// THIS IS THE MAIN WINDOW HANDLER WHERE ALL THE ACTION OCCURS
LRESULT CALLBACK MainWindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
switch(uMsg)
{
// Initialize our window and create our child controls.
case WM_CREATE:
{
// Create your edit window ... we wont bother with position we will fix later
CreateWindowEx(WS_EX_CLIENTEDGE, WC_EDIT, TEXT("SOME TEXT HERE"),
ES_LEFT | WS_CHILD | WS_VISIBLE,
0, 0, 0, 0, hWnd, (HMENU)IDC_TEXT, 0, NULL);
// Create your button window.
CreateWindowEx(0, WC_BUTTON, TEXT("&Count text"),
BS_PUSHBUTTON |
WS_CHILD | WS_VISIBLE,
0, 0, 0, 0, hWnd, (HMENU)IDC_BUTTON, 0, NULL);
// Create your answer text box.
CreateWindowEx(0, WC_STATIC, TEXT("0"),
SS_LEFT |
WS_CHILD | WS_VISIBLE,
0, 0, 0, 0, hWnd, (HMENU)IDC_ANSWER, 0, NULL);
}
return 0;

	// We accept this message so we can set a minimum window size. This only sets the users
	// tracking size. The window itself can always be resized smaller programmatically unless
	// you restrict it in WM\_WINDOWPOSCHANGING/WM\_WINDOWPOSCHANGED. 
	case WM\_GETMINMAXINFO:
		{
			LPMINMAXINFO lpInfo = (LPMINMAXINFO)lParam;
			if(lpInfo) {
				lpInfo->ptMinTrackSize.x = 300;
				lpInfo->ptMinTrackSize.y = 300;
			};
		}
		return 0;
	// These next two messages are better to use rather than WM\_MOVE/WM\_SIZE.
	// Remember WM\_MOVE/WM\_SIZE are from 16bit windows. In 32bit windows the window
	// manager only sends these two messages and the DefWindowProc() handler actually
	// accepts them and converts them to WM\_MOVE/WM\_SIZE.
	// 
	// We accept this so we can scale our controls to the client size.
	case WM\_WINDOWPOSCHANGING:
	case WM\_WINDOWPOSCHANGED:
		{
			HDWP hDWP;
		
			// Create a deferred window handle.
			if(hDWP = BeginDeferWindowPos(3)){ // Defer 3 controls to stop flashing
				
                                    // Position edit box
				hDWP = DeferWindowPos(hDWP, GetDlgItem(hWnd, ID