Solved Setting input as static text

Hewlett-packard / Pavilion touchsmart amd a...
February 25, 2014 at 11:54:06
Specs: Windows 7, 8GB
Hi, so I'm trying to make my code so that after typing something in an edit box, by pushing submit it will set the static box below it as whatever the user inputted. It sets the title of the window as the users input though, not the static text.. What is wrong with my code? Here it is:


#include <windows.h>
#include <conio.h>
#define ID_BTN 1
#define ID_TEXTBOX 2

static HWND hwndTextbox;
static HWND respondbox;
/* This is where all the input to the window goes to */
LRESULT CALLBACK WndProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam) {
switch(Message)
{
case WM_CREATE:{
CreateWindow(TEXT("STATIC"), TEXT(""),
WS_VISIBLE | WS_CHILD | WS_BORDER | ES_AUTOVSCROLL,
10, 60, 200, 20,
hwnd, (HMENU) ID_TEXTBOX, NULL, NULL
);

hwndTextbox = CreateWindow(TEXT("EDIT"), TEXT("value"),
WS_VISIBLE | WS_CHILD | WS_BORDER | ES_AUTOHSCROLL,
10, 10, 200, 20,
hwnd, (HMENU) ID_TEXTBOX, NULL, NULL
);

CreateWindow(TEXT("button"), TEXT ("Click me"),
WS_VISIBLE | WS_CHILD,
10, 30, 80, 20,
hwnd, (HMENU) ID_BTN, NULL, NULL
);
break;
}
case WM_COMMAND:{
// action for default button
if (LOWORD(wParam) == ID_BTN){

// create some default variables
int len = GetWindowTextLength(hwndTextbox) + 1;
static char respondbox[500];

GetWindowText(hwndTextbox, respondbox, len);


SetWindowText(hwnd, respondbox);
}

break;
}
/* Upon destruction, tell the main thread to stop */
case WM_DESTROY: {
PostQuitMessage(0);
break;
}

/* All other messages (a lot of them) are processed using default procedures */
default:
return DefWindowProc(hwnd, Message, wParam, lParam);
}
return 0;
}

/* The 'main' function of Win32 GUI programs: this is where execution starts */
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
WNDCLASSEX wc; /* A properties struct of our window */
HWND hwnd; /* A 'HANDLE', hence the H, or a pointer to our window */
MSG Msg; /* A temporary location for all messages */

/* zero out the struct and set the stuff we want to modify */
memset(&wc,0,sizeof(wc));
wc.cbSize = sizeof(WNDCLASSEX);
wc.lpfnWndProc = WndProc; /* This is where we will send messages to */
wc.hInstance = hInstance;
wc.hCursor = LoadCursor(NULL, IDC_ARROW);

/* White, COLOR_WINDOW is just a #define for a system color, try Ctrl+Clicking it */
wc.hbrBackground = GetSysColorBrush (COLOR_3DFACE);

wc.lpszClassName = "WindowClass";
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION); /* Load a standard icon */
wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION); /* use the name "A" to use the project icon */

if(!RegisterClassEx(&wc)) {
MessageBox(NULL, "Window Registration Failed!","Error!",MB_ICONEXCLAMATION|MB_OK);
return 0;
}

hwnd = CreateWindowEx(WS_EX_CLIENTEDGE,"WindowClass","Ian",WS_VISIBLE|WS_SYSMENU,
CW_USEDEFAULT, /* x */
CW_USEDEFAULT, /* y */
640, /* width */
480, /* height */
NULL,NULL,hInstance,NULL);

if(hwnd == NULL) {
MessageBox(NULL, "Window Creation Failed!","Error!",MB_ICONEXCLAMATION|MB_OK);
return 0;
}

/*
This is the heart of our program where all input is processed and
sent to WndProc. Note that GetMessage blocks code flow until it receives something, so
this loop will not produce unreasonably high CPU usage
*/
while(GetMessage(&Msg, NULL, 0, 0) > 0) { /* If no error is received... */
TranslateMessage(&Msg); /* Translate key codes to chars if present */
DispatchMessage(&Msg); /* Send it to WndProc */
}
return Msg.wParam;
}


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#1
February 26, 2014 at 13:52:58
✔ Best Answer
I reinstalled C++ just for you. Then I had to add VS 2010's SP1, because trying to link without SP1 is now broken.

SetWindowText(hwnd, respondbox);
The problem is with this line. You're setting the text of the window receiving the WM_COMMAND, which is your main window. If you want to set the text in the "static" textbox, you need to pass the hwnd of that window. You don't actually save the hwnd of the output textbox, so you really should do that, too.

How To Ask Questions The Smart Way


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#2
February 26, 2014 at 17:28:45
Thanks that helped! Functions fine now

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