Z góry zaznaczam ze dopiero zaczynam zabawę z WinApi,korzystam z kursów online i już na początku mały ZONK, mianowicie mam coś takiego :?
#include
/* Declare Windows procedure */
LRESULT CALLBACK WindowProcedure (HWND , UINT , WPARAM, LPARAM);
/* Make the class name into a global variable */
char szClassName[] = "WindowsApp";
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) COLOR_BACKGROUND;
/* 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 */
"Glowne okno programu", /* 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 */
HWND a = CreateWindowEx(0, "BUTTON", "Click me", WS_CHILD | WS_VISIBLE, 10, 10, 150, 30 ,hwnd, NULL, hThisInstance, NULL);
HWND b = CreateWindowEx(0, "BUTTON", "Ckeckbox", WS_CHILD | WS_VISIBLE | BS_CHECKBOX, 100, 100, 150, 30, hwnd, NULL, hThisInstance, NULL);
HWND c = CreateWindowEx(0, "BUTTON", "Ckeckbox", WS_CHILD | WS_VISIBLE | BS_GROUPBOX, 100, 200, 150, 30, hwnd, NULL, hThisInstance, NULL);
HWND d = CreateWindowEx(0, "BUTTON", "Ckeckbox", WS_CHILD | WS_VISIBLE | BS_RADIOBUTTON, 300, 300, 150, 30, hwnd, NULL, hThisInstance, NULL);
ShowWindow (hwnd, nFunsterStil);
UpdateWindow(hwnd);
/* 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;
}
/* 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_DESTROY:
PostQuitMessage (0); /* send a WM_QUIT to the message queue */
break;
case WM_KEYDOWN:
PostQuitMessage (0); /* send a WM_QUIT to the message queue */
break;
case WM_COMMAND:
// if((HWND)lParam == a)
{
MessageBox(hwnd, "Nacisnąłeś przycisk!", "Ha!", MB_ICONINFORMATION);
}
break;
default: /* for messages that we don't deal with */
return DefWindowProc (hwnd, message, wParam, lParam);
}
return 0;
}
moje pytanie dlaczego za komentowana linijka
// if((HWND)lParam == a)
wywala błąd
:roll: