#include "sysmets.h"
#include <windows.h>
#include <tchar.h>
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR szCmdLine, int nCmdShow)
{
static TCHAR szAppName[] = TEXT("text 02");
HWND hwnd = NULL;
MSG msg = {0};
WNDCLASS wndclass = {0};
//init wndclass
wndclass.style = CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = WndProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hInstance = hInstance;
wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wndclass.lpszMenuName = NULL;
wndclass.lpszClassName = szAppName;
//register class
if (!RegisterClass(&wndclass))
{
MessageBox(NULL, TEXT("This program next winnt"), TEXT("run error!"), MB_ICONERROR);
return 0;
}
hwnd = CreateWindow(szAppName, TEXT("Text02 for text"), WS_OVERLAPPEDWINDOW | WS_VSCROLL, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL);
ShowWindow(hwnd, nCmdShow);
UpdateWindow(hwnd);
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return (int)msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static int cxChar = 0;
static int cxCaps = 0;
static int cyChar = 0;
static int cyClient = 0;
static int nVscrollPos = 0;
HDC hdc = NULL;
PAINTSTRUCT ps = {0};
TCHAR szBuffer[10] = "/0";
TEXTMETRIC tm = {0};
int i = 0;
int y = 0;
switch (message)
{
case WM_CREATE:
{
hdc = GetDC(hwnd);
GetTextMetrics(hdc, &tm);
cxChar = tm.tmAveCharWidth;
cxCaps = (tm.tmPitchAndFamily & 1 ? 3 : 2) * cxChar / 2;
cyChar = tm.tmHeight + tm.tmExternalLeading;
ReleaseDC(hwnd, hdc);
SetScrollRange(hwnd, SB_VERT, 0, NUMLINES - 1L, FALSE);
SetScrollPos(hwnd, SB_VERT, nVscrollPos, TRUE);
}
return 0;
case WM_SIZE:
{
cyClient = HIWORD(lParam);
}
return 0;
case WM_VSCROLL:
{
switch (LOWORD(wParam))
{
case SB_LINEUP:
{
nVscrollPos -= 1;
}
break;
case SB_LINEDOWN:
{
nVscrollPos += 1;
}
break;
case SB_PAGEUP:
{
nVscrollPos -= cyClient / cyChar;
}
break;
case SB_PAGEDOWN:
{
nVscrollPos += cyClient / cyChar;
}
break;
case SB_THUMBPOSITION:
{
nVscrollPos = HIWORD(wParam);
}
break;
default:
break;
}
}
nVscrollPos = max(0, min(nVscrollPos, NUMLINES - 1));
if (nVscrollPos != GetScrollPos(hwnd, SB_VERT))
{
SetScrollPos(hwnd, SB_VERT, nVscrollPos, TRUE);
InvalidateRect(hwnd, NULL, TRUE);
}
return 0;
case WM_PAINT:
{
hdc = BeginPaint(hwnd, &ps);
for (i = 0; i < NUMLINES; i++)
{
y = cyChar * (i - nVscrollPos);
TextOut(hdc, 0, y, sysmetrics[i].szLabel, strlen(sysmetrics[i].szLabel));
TextOut(hdc, 22 * cxCaps, y, sysmetrics[i].szDesc, strlen(sysmetrics[i].szDesc));
SetTextAlign(hdc, TA_RIGHT | TA_TOP);
TextOut(hdc, 22 * cxCaps + 40 * cxChar, y, szBuffer, wsprintf(szBuffer, "%5d", GetSystemMetrics(sysmetrics[i].iIndex)));
SetTextAlign(hdc, TA_RIGHT | TA_TOP);
}
EndPaint(hwnd, &ps);
}
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}