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//+---------------------------------------------------------------------------
//
// HELLO_WIN.C - Windows GUI 'Hello World!' Example
//
//+---------------------------------------------------------------------------
#include <windows.h>
#define APPNAME "HELLO_WIN"
char szAppName[] = APPNAME; // The name of this application
char szTitle[] = APPNAME; // The title bar text
const char *pWindowText;
void CenterWindow(HWND hWnd);
//+---------------------------------------------------------------------------
//
// Function: WndProc
//
// Synopsis: very unusual type of function - gets called by system to
// process windows messages.
//
// Arguments: same as always.
//----------------------------------------------------------------------------
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message) {
// ----------------------- first and last
case WM_CREATE:
CenterWindow(hwnd);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
// ----------------------- get out of it...
case WM_RBUTTONUP:
DestroyWindow(hwnd);
break;
case WM_KEYDOWN:
if (VK_ESCAPE == wParam)
DestroyWindow(hwnd);
break;
// ----------------------- display our minimal info
case WM_PAINT:
{
PAINTSTRUCT ps;
HDC hdc;
RECT rc;
hdc = BeginPaint(hwnd, &ps);
GetClientRect(hwnd, &rc);
SetTextColor(hdc, RGB(240,240,96));
SetBkMode(hdc, TRANSPARENT);
DrawText(hdc, pWindowText, -1, &rc, DT_CENTER|DT_SINGLELINE|DT_VCENTER);
EndPaint(hwnd, &ps);
break;
}
// ----------------------- let windows do all other stuff
default:
return DefWindowProc(hwnd, message, wParam, lParam);
}
return 0;
}
//+---------------------------------------------------------------------------
//
// Function: WinMain
//
// Synopsis: standard entrypoint for GUI Win32 apps
//
//----------------------------------------------------------------------------
int APIENTRY WinMain(
HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow
)
{
MSG msg;
WNDCLASS wc;
HWND hwnd;
pWindowText = lpCmdLine[0] ? lpCmdLine : "Hello Windows!";
// Fill in window class structure with parameters that describe
// the main window.
ZeroMemory(&wc, sizeof wc);
wc.hInstance = hInstance;
wc.lpszClassName = szAppName;
wc.lpfnWndProc = (WNDPROC)WndProc;
wc.style = CS_DBLCLKS|CS_VREDRAW|CS_HREDRAW;
wc.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
if (FALSE == RegisterClass(&wc))
return 0;
// create the browser
hwnd = CreateWindow(
szAppName,
szTitle,
WS_OVERLAPPEDWINDOW|WS_VISIBLE,
CW_USEDEFAULT,
CW_USEDEFAULT,
360,//CW_USEDEFAULT,
240,//CW_USEDEFAULT,
0,
0,
hInstance,
0);
if (NULL == hwnd)
return 0;
// Main message loop:
while (GetMessage(&msg, NULL, 0, 0) > 0) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
//+---------------------------------------------------------------------------
//+---------------------------------------------------------------------------
void CenterWindow(HWND hwnd_self)
{
HWND hwnd_parent;
RECT rw_self, rc_parent, rw_parent;
int xpos, ypos;
hwnd_parent = GetParent(hwnd_self);
if (NULL == hwnd_parent)
hwnd_parent = GetDesktopWindow();
GetWindowRect(hwnd_parent, &rw_parent);
GetClientRect(hwnd_parent, &rc_parent);
GetWindowRect(hwnd_self, &rw_self);
xpos = rw_parent.left + (rc_parent.right + rw_self.left - rw_self.right) / 2;
ypos = rw_parent.top + (rc_parent.bottom + rw_self.top - rw_self.bottom) / 2;
SetWindowPos(
hwnd_self, NULL,
xpos, ypos, 0, 0,
SWP_NOSIZE|SWP_NOZORDER|SWP_NOACTIVATE
);
}
//+---------------------------------------------------------------------------
|
