Windows Programs Note Releasing Resources
Hi its took me a while to realise but once my windows program has finished it does not release the resources it has been using. If I press control alt delete and then go to processes I find my application that should of been terminated using 98% of the resources and I was wondering why?
Code:
// This Program is designed to incorporate defining a windows class
// Creating a window a message handler using custom icons, cursors
// Also a choice of music files made possible by a message system
#include <windows.h>
#include <windowsx.h>
#include "RESOURCES.H"
HINSTANCE theInstance;
LRESULT CALLBACK messageHandler (HWND theWin, UINT theMsg, WPARAM wparam, LPARAM lparam)
{
PAINTSTRUCT ps;
HDC hdc;
switch (theMsg)
{
case WM_CREATE:
{
return 0;
break;
}
case WM_PAINT:
{
hdc = BeginPaint(theWin,&ps);
EndPaint(theWin,&ps);
return 0;
break;
}
case WM_DESTROY:
{
PlaySound(NULL,theInstance,SND_PURGE);
PostQuitMessage(0);
break;
return 0;
}
case WM_COMMAND:
{
switch (LOWORD(wparam))
{
case MENU_FILE_ID3:
{
PostQuitMessage(0);
return 0;
break;
}
case MENU_CURSOR_ID1:
{
HCURSOR theCursor;
theCursor = LoadCursor(theInstance, MAKEINTRESOURCE(CURSOR_ID1));
SetCursor(theCursor);
return 0;
break;
}
case MENU_CURSOR_ID2:
{
HCURSOR theCursor;
theCursor = LoadCursor(theInstance, MAKEINTRESOURCE(CURSOR_ID2));
SetCursor(theCursor);
return 0;
break;
}
case MENU_CURSOR_ID3:
{
HCURSOR theCursor;
theCursor = LoadCursor(theInstance, MAKEINTRESOURCE(CURSOR_ID3));
SetCursor(theCursor);
return 0;
break;
}
case MENU_SONG_ID1:
{
PlaySound(MAKEINTRESOURCE(WAVE_ID1), theInstance,
SND_RESOURCE | SND_LOOP | SND_ASYNC);
return 0;
break;
}
case MENU_SONG_ID2:
{
PlaySound(MAKEINTRESOURCE(WAVE_ID2), theInstance,
SND_RESOURCE | SND_LOOP | SND_ASYNC);
return 0;
break;
}
case MENU_SONG_ID3:
{
PlaySound(MAKEINTRESOURCE(WAVE_ID3), theInstance,
SND_RESOURCE | SND_LOOP | SND_ASYNC);
return 0;
break;
}
default:
{
break;
}
}
}
default:
{
break;
}
}
return (DefWindowProc(theWin,theMsg,wparam,lparam));
}
int WINAPI WinMain (HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,
int nShowCmd)
{
theInstance = hInstance;
MSG theMsg;
HWND WindowsHandle;
WNDCLASSEX winclass;
winclass.cbSize = sizeof(WNDCLASSEX);
winclass.style = CS_DBLCLKS | CS_OWNDC | CS_HREDRAW | CS_VREDRAW;
winclass.cbClsExtra = 0;
winclass.cbWndExtra = 0;
winclass.hInstance = hInstance;
winclass.lpfnWndProc = messageHandler;
winclass.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(ICON_ID1));
winclass.hCursor = LoadCursor(NULL, IDC_ARROW);
winclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
winclass.lpszMenuName = "MainMenu";
winclass.lpszClassName = "windowClass";
winclass.hIconSm = LoadIcon(hInstance, MAKEINTRESOURCE(ICON_ID1));
if (!(RegisterClassEx(&winclass)))
return 0;
if (!(WindowsHandle = CreateWindowEx(NULL, "windowClass", "The Big One Window",
WS_OVERLAPPEDWINDOW | WS_VISIBLE, 0,0, 400, 400, NULL, NULL, hInstance, NULL)))
return 0;
while (1)
{
if (PeekMessage(&theMsg,WindowsHandle, 0, 0, PM_REMOVE))
{
if (theMsg.message == WM_QUIT)
break;
TranslateMessage(&theMsg);
DispatchMessage(&theMsg);
}
}
return 0;
}
Ps. For some reason my cursor is not changing when the user asks for a different cursor on the menu bar. I have been told that the SetCursor function has to be maintained by yourself but I don't know how to do this. If someone could help with this too it would be very greatful.
