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#define WIN32_LEAN_AND_MEAN
// stops windows.h dragging is loads of unwanted stuff
#include <windows.h>
#include "resource.h"
const WCHAR achTitle [] = L"Example #1";
const WCHAR achWindowClass[] = L"ExampleNumberOne";
int r = 0;
int g = 0;
int b = 0;
LRESULT CALLBACK WndProcedure(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
ATOM MyRegisterClass(HINSTANCE hInstance);
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine,
int nCmdShow)
{
MyRegisterClass(hInstance);
if(!InitInstance(hInstance, nCmdShow))
{
return FALSE;
}
MSG msg = {0};
while(GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
LRESULT CALLBACK WndProcedure(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{
switch(Msg)
{
case WM_DESTROY:
PostQuitMessage(0);
break;
case WM_COMMAND:
{
bool inval = false;
switch(LOWORD(wParam))
{
case ID_Exit:
{
DestroyWindow(hWnd);
}
break;
case ID_Red:
{
r = 250;
g = 0;
b = 0;
inval = true;
} break;
case ID_Green:
{
r = 0;
g = 250;
b = 0;
inval = true;
} break;
case ID_Blue:
{
r = 0;
g = 0;
b = 250;
inval = true;
} break;
}
if(inval)
InvalidateRect(hWnd, NULL, TRUE);
}
break;
case WM_PAINT:
{
PAINTSTRUCT ps;
HDC hdc = BeginPaint(hWnd, &ps);
TextOut(hdc,10,10,L"Hello World",11);
HBRUSH blueBrush=CreateSolidBrush(RGB(r,g,b));
RECT rct;
rct.left=30;
rct.right=60;
rct.top=30;
rct.bottom=60;
FillRect(hdc, &rct, blueBrush);
DeleteObject(blueBrush); // delete brush!
EndPaint(hWnd, &ps);
}
break;
default:
return DefWindowProc(hWnd, Msg, wParam, lParam);
}
return 0;
}
ATOM
MyRegisterClass(HINSTANCE hInstance)
{
WNDCLASSEX wcex = {0};
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = WndProcedure;
wcex.hInstance = hInstance;
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
wcex.lpszClassName = achWindowClass;
wcex.lpszMenuName = MAKEINTRESOURCE(ID_Menu);
return RegisterClassEx(&wcex);
}
BOOL
InitInstance(HINSTANCE hInstance, int nCmdShow)
{
HWND hWnd = CreateWindow(achWindowClass,
achTitle,
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
0,
CW_USEDEFAULT,
0,
NULL,
NULL,
hInstance,
NULL);
if(NULL == hWnd)
{
return FALSE;
}
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
return TRUE;
}
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