Brauche Hilfe im C Code der Win32API.
Sorry.
Der Compiler meldet immer:
"112 C:\Users\Programme\Desktop\Arbeitsumgebung\Login\main.c [Warning] assignment makes pointer from integer without a cast "
Ich benutze Dev-C++.
Code:
Sorry.
Der Compiler meldet immer:
"112 C:\Users\Programme\Desktop\Arbeitsumgebung\Login\main.c [Warning] assignment makes pointer from integer without a cast "
Ich benutze Dev-C++.
Code:
C++:
#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
/* Declare Windows procedure */
LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);
/* Make the class name into a global variable */
char szClassName[ ] = "Login";
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 */
szClassName, /* Title Text */
WS_OVERLAPPEDWINDOW, /* default window */
CW_USEDEFAULT, /* Windows decides the position */
CW_USEDEFAULT, /* where the window ends up on the screen */
CW_USEDEFAULT, /* The programs width */
CW_USEDEFAULT, /* 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;
}
/* This function is called by the Windows function DispatchMessage() */
LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static HWND hButton;
static HWND hEdit;
switch (message) /* handle the messages */
{
case WM_CREATE:
{
FILE *f;
char *buffer = NULL;
int iFileSize;
f = fopen("text.txt", "rb");
if(f != NULL)
{
fseek(f, 0, SEEK_END);
iFileSize = ftell(f);
buffer = malloc(iFileSize);
fseek(f, 0, SEEK_SET);
fread(buffer, 1, iFileSize, f);
fclose(f);
}
hEdit = WindowCreateEx(WS_EX_CLIENTEDGE,
"edit",
buffer, //Inhalt des Editfeldes
WS_CHILD | WS_VISIBLE | WS_VSCROLL | ES_MULTILINE |
ES_AUTOVSCROLL,
0, 0, 0, 0,
hwnd,
NULL,
((LPCREATESTRUCT) lParam) -> hInstance,
NULL); // <-Hier wird der Fehler markiert
free(buffer);
hButton = CreateWindow("button",
"Beenden",
WS_CHILD | WS_VISIBLE,
0, 0, 0, 0,
hwnd,
NULL,
((LPCREATESTRUCT) lParam) -> hInstance,
NULL);
return 0;
}
case WM_SIZE:
MoveWindow(hEdit,
0,
0,
LOWORD(lParam),
HIWORD(lParam),
TRUE);
MoveWindow(hButton, //Handle des Buttons
LOWORD(lParam) / 2 - 80, //Mitte des Fensters - hälfte des Buttons
HIWORD(lParam) - 30, //unterer Rand des Fensters - 30 Pixel (8 Pixel unter Button noch frei)
160, //X-Größe Button
22, //Y-Größe Button
TRUE); //Sichtbarkeit des Buttons
return 0;
case WM_COMMAND:
if(lParam == (LPARAM)hButton)
if(HIWORD(wParam) == BN_CLICKED)
SendMessage(hwnd, WM_CLOSE, 0, 0);
return 0;
case WM_CLOSE:
{
FILE *f;
char *buffer = NULL;
int iLength;
iLength = GetWindowTextLength(hEdit);
buffer = malloc(iLength);
GetWindowText(hEdit, buffer, iLength + 1);
f = fopen("Text.txt", "wb");
fwrite(buffer, 1, iLength, f);
fclose(f);
free(buffer);
DestroyWindow(hwnd);
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;
}
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