小甲鱼老师讲的用ScrollWindow函数做一个快速滚动条窗口，我做的出问题了 求朋友帮下
MyWindows.c -- 基本窗口模型《Windows 程序设计（SDK）》视频教程
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#include <windows.h>
#include "strsafe.h"
#include "sysmets.h"
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT("MyWindows");
HWND hwnd;
MSG msg;
WNDCLASS 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;
if (!RegisterClass(&wndclass))
{
MessageBox(NULL, TEXT("这个程序需要在 Windows NT 才能执行！"), szAppName, MB_ICONERROR);
return 0;
}
hwnd = CreateWindow(szAppName,
TEXT("鱼C工作室"),
WS_OVERLAPPEDWINDOW|WS_HSCROLL|WS_VSCROLL,
CW_USEDEFAULT,
CW_USEDEFAULT,;
CW_USEDEFAULT,
CW_USEDEFAULT,
NULL,
NULL,
hInstance,
NULL);
ShowWindow(hwnd, iCmdShow);
UpdateWindow(hwnd);
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
HDC hdc;
PAINTSTRUCT ps;
TEXTMETRIC tm;
SCROLLINFO si;
TCHAR szBuffer;
static int cxChar, cxCaps, cyChar,cxClient,cyClient,iMaxWidth;
size_t iTarget;
int i,x,y,iVertPos,iHorzPos,iPaintBeg,iPaintEnd;
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);
iMaxWidth=22*cxCaps+40*cxChar;
return 0;
case WM_SIZE:
//设置垂直滚动条
cxClient=LOWORD(lParam);
cyClient=HIWORD(lParam);
si.cbSize=sizeof(si);
si.fMask=SIF_RANGE|SIF_PAGE;
si.nMin=0;
si.nMax=NUMLINES-1;
si.nPage=cyClient/cyChar;
SetScrollInfo(hwnd,SB_VERT,&si,TRUE);
si.cbSize=sizeof(si);
si.fMask=SIF_RANGE|SIF_PAGE;
si.nMin=0;
si.nMax=2+iMaxWidth/cxChar;
si.nPage=cxClient/cxChar;
SetScrollInfo(hwnd,SB_HORZ,&si,TRUE);
return 0;
case WM_VSCROLL:
si.cbSize=sizeof(si);
si.fMask=SIF_ALL;
GetScrollInfo(hwnd,SB_VERT,&si);
iVertPos=si.nPos;
//根据消息的通知码改变滑块的位置
switch (LOWORD(wParam))
{
case SB_LINEUP:
si.nPos-=1;
break;
case SB_LINEDOWN:
si.nPos+=1;
break;
case SB_PAGEUP:
si.nPos-=si.nPage;
break;
case SB_PAGEDOWN:
si.nPos+=si.nPage;
break;
case SB_THUMBTRACK:
si.nPos=si.nTrackPos;
break;
default:
break;
}
//设置改变的滑快的新位置
si.fMask=SIF_POS;
SetScrollInfo(hwnd,SB_VERT,&si,TRUE);
//获取滑块的位置
GetScrollInfo(hwnd,SB_VERT,&si);
//与以前的值比较
if(si.nPos!=iVertPos)
{
ScrollWindow(hwnd,0,cyChar*(iVertPos-si.nPos),NULL,NULL);
UpdateWindow(hwnd);
}
return 0;
case WM_HSCROLL:
si.cbSize=sizeof(si);
si.fMask=SIF_ALL;
GetScrollInfo(hwnd,SB_HORZ,&si);
iHorzPos=si.nPos;
//根据消息的通知码改变滑块的位置
switch (LOWORD(wParam))
{
case SB_LINELEFT:
si.nPos-=1;
break;
case SB_LINERIGHT:
si.nPos+=1;
break;
case SB_PAGELEFT:
si.nPos-=si.nPage;
break;
case SB_PAGERIGHT:
si.nPos+=si.nPage;
break;
case SB_THUMBTRACK:
si.nPos=si.nTrackPos;
break;
default:
break;
}
//设置改变的滑快的新位置
si.fMask=SIF_POS;
SetScrollInfo(hwnd,SB_HORZ,&si,TRUE);
//获取滑块的位置
GetScrollInfo(hwnd,SB_HORZ,&si);
if(si.nPos!=iHorzPos)
{
ScrollWindow(hwnd,cxChar*(iHorzPos-si.nPos),0,NULL,NULL);
UpdateWindow(hwnd);
}
return 0;
case WM_PAINT:
hdc = BeginPaint(hwnd, &ps);
si.cbSize=sizeof(si);
si.fMask=SIF_POS;
GetScrollInfo(hwnd,SB_VERT,&si);
iVertPos=si.nPos;
GetScrollInfo(hwnd,SB_HORZ,&si);
iHorzPos=si.nPos;
iPaintBeg=max(0,iVertPos+ps.rcPaint.top/cyChar);
iPaintEnd=min(NUMLINES-1,iVertPos+ps.rcPaint.bottom/cyChar);
for (i=iPaintBeg; i<=iPaintEnd; i++)
{
x=cxChar*(1-iHorzPos);
y=cyChar*(i-iVertPos);
StringCchLength(sysmetrics.szLabel,1024,&iTarget );
TextOut(hdc,x,y,sysmetrics.szLabel,iTarget);
StringCchLength(sysmetrics.szDesc,1024,&iTarget);
TextOut(hdc,x+22*cxChar,y,sysmetrics.szDesc,iTarget);
SetTextAlign(hdc,TA_RIGHT|TA_TOP);
StringCchPrintf(szBuffer,10,TEXT("%5"),
GetSystemMetrics(sysmetrics.iIndex));
StringCchLength(szBuffer,10,&iTarget);
TextOut(hdc,x+22*cxCaps+40*cxChar,y,szBuffer,iTarget);
SetTextAlign(hdc,TA_LEFT|TA_TOP);
}
EndPaint(hwnd, &ps);
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
求大神帮下 解答下
StringCchPrintf(szBuffer,10,TEXT("%5"),
%5是什么？%d吧。 窗口我觉得是最烦人的。。。但是大兄弟你那个%5是最耀眼的 谢谢 兄弟 数字出来了 水平滚动条 还是没出来{:5_100:}
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