Created
June 22, 2014 09:08
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Windows GUI example code.
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// Windows GUI example code | |
#include < windows.h > | |
/* Declare Windows procedure */ | |
LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM); | |
/* Make the class name into a global variable */ | |
char szClassName[ ] = "WindowsExApp"; | |
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 */ | |
"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; | |
} | |
/* This function is called by the Windows function DispatchMessage() */ | |
LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) | |
{ | |
HDC hDC; | |
PAINTSTRUCT Ps; | |
switch (message) /* handle the messages */ | |
{ | |
case WM_PAINT: | |
hDC = BeginPaint(hwnd, &Ps); | |
MoveToEx(hDC, 160, 120, NULL); | |
LineTo(hDC, 364, 222); | |
MoveToEx(hDC, 60, 20, NULL); | |
LineTo(hDC, 60, 122); | |
LineTo(hDC, 264, 122); | |
LineTo(hDC, 60, 20); | |
EndPaint(hwnd, &Ps); | |
break; | |
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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