edit box affecting displaying of text?
Basically i had a problem before where is i called i function by a button and then deleted the button there would be a problem when i try and write text over where the old button used to be. I solved that by using ShowWindow() instead of DestroyWindow(). But now in the function if i create a button or edit box, the problem happens again.
In the code below delete the edit box creation in the function and the problem goes, but how can i solve this text not appearing properly.
Code:
#include <windows.h>
/* Declare Windows procedure */
LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);
/* Make the class name into a global variable */
char szClassName[ ] = "WindowsApp";
HINSTANCE hInstGlobal;
int WINAPI WinMain (HINSTANCE hThisInstance,
HINSTANCE hPrevInstance,
LPSTR lpszArgument,
int nFunsterStil)
{
HWND hwnd; /* This is the handle for our window */
MSG messages; /* Here messages to the application are saved */
WNDCLASSEX wincl; /* Data structure for the windowclass */
/* The Window structure */
wincl.hInstance = hThisInstance;
wincl.lpszClassName = szClassName;
wincl.lpfnWndProc = WindowProcedure; /* This function is called by windows */
wincl.style = CS_DBLCLKS; /* Catch double-clicks */
wincl.cbSize = sizeof (WNDCLASSEX);
/* Use default icon and mouse-pointer */
wincl.hIcon = LoadIcon (NULL, IDI_APPLICATION);
wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
wincl.lpszMenuName = NULL; /* No menu */
wincl.cbClsExtra = 0; /* No extra bytes after the window class */
wincl.cbWndExtra = 0; /* structure or the window instance */
/* Use Windows's default color as the background of the window */
wincl.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH);
/* Register the window class, and if it fails quit the program */
if (!RegisterClassEx (&wincl))
return 0;
/* The class is registered, let's create the program*/
hwnd = CreateWindowEx (
0, /* Extended possibilites for variation */
szClassName, /* Classname */
"Windows App", /* Title Text */
WS_OVERLAPPEDWINDOW, /* default window */
CW_USEDEFAULT, /* Windows decides the position */
CW_USEDEFAULT, /* where the window ends up on the screen */
544, /* The programs width */
375, /* and height in pixels */
HWND_DESKTOP, /* The window is a child-window to desktop */
NULL, /* No menu */
hThisInstance, /* Program Instance handler */
NULL /* No Window Creation data */
);
/* Make the window visible on the screen */
ShowWindow (hwnd, nFunsterStil);
/* Run the message loop. It will run until GetMessage() returns 0 */
while (GetMessage (&messages, NULL, 0, 0))
{
/* Translate virtual-key messages into character messages */
TranslateMessage(&messages);
/* Send message to WindowProcedure */
DispatchMessage(&messages);
}
/* The program return-value is 0 - The value that PostQuitMessage() gave */
return messages.wParam;
}
HWND hButton, hName;
void buttonpressed(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
HDC hdc;
hdc = GetDC (GetParent((HWND) lParam));
HFONT font;
PAINTSTRUCT ps;
font = CreateFont(30, 0, 0, 0,
FW_NORMAL, FALSE, FALSE, FALSE,
ANSI_CHARSET, OUT_DEFAULT_PRECIS,
CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY,
DEFAULT_PITCH | FF_ROMAN,
"Times New Roman");
SelectObject(hdc, font);
TextOut(hdc, 10, 10, "When i delete a button the text cannot be seen!", 47);
DeleteObject(font);
EndPaint(hwnd, &ps);
hEdit = CreateWindow ("BUTTON", "Now i'm here the text doesn't show properly",
WS_CHILD | WS_VISIBLE |
BS_PUSHBUTTON,
100, 100, 140, 20,
hwnd, (HMENU) 2,
hInstGlobal, NULL);
}
/* This function is called by the Windows function DispatchMessage() */
LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message) /* handle the messages */
{
case WM_CREATE:
hButton = CreateWindow ("BUTTON", "Press Me",
WS_CHILD | WS_VISIBLE |
BS_PUSHBUTTON,
10, 10, 140, 20,
hwnd, (HMENU) 1,
hInstGlobal, NULL);
return 0;
case WM_COMMAND:
if (HIWORD(wParam) == BN_CLICKED)
{
if (LOWORD(wParam) == 1)
{
ShowWindow(hButton, SW_HIDE);
buttonpressed(hwnd, message, wParam, lParam);
DestroyWindow(hButton);
return 0;
}
return 0;
}
return 0;
case WM_DESTROY:
PostQuitMessage (0); /* send a WM_QUIT to the message queue */
break;
default: /* for messages that we don't deal with */
return DefWindowProc (hwnd, message, wParam, lParam);
}
return 0;
}
Ps. Sorry if there are any errors, I had to write this in the libruary where there are no compilers and where the internet connection is slow.
