VC设置字符间距

用到了一个结构体和一个函数：LOGFONT和SetTextCharacterEXtra,但是LOGFONT好像也可以不需要特别的进行使用来使SetTextCharacterExtra起作用。SetTextCharacter函数：This function sets the intercharacter spacing. Intercharacter spacing is added to each character, including break characters, when the system writes a line of text. int SetTextCharacterExtra( HDC hdc, // handle to DC int nCharExtra // extra-space value);Parametershdc [in] Handle to the device context. nCharExtra [in] Specifies the amount of extra space, in logical units, to be added to each character. If the current mapping mode is not MM_TEXT, the nCharExtra parameter is transformed and rounded to the nearest pixel. Return ValuesIf the function succeeds, the return value is the previous intercharacter spacing. If the function fails, the return value is 0x80000000. 需要提一下的是LOGFONT的一个成员：lfPitchAndFamilylfPitchAndFamily Specifies the pitch and family of the font. The two low-order bits specify the pitch of the font and can be one of the following values. DEFAULT_PITCHFIXED_PITCHVARIABLE_PITCHBits 4 through 7 of the member specify the font family and can be one of the following values. FF_DECORATIVEFF_DONTCAREFF_MODERNFF_ROMANFF_SCRIPTFF_SWISSThe proper value can be obtained by using the Boolean OR operator to join one pitch constant with one family constant. 下面是代码段：// TestFontsDlg.h : header file//#if !defined(AFX_TESTFONTSDLG_H__1128C2BD_CCE9_4A5D_879B_6CEF9EED2824__INCLUDED_)#define AFX_TESTFONTSDLG_H__1128C2BD_CCE9_4A5D_879B_6CEF9EED2824__INCLUDED_#if _MSC_VER >= 1000#pragma once#endif // _MSC_VER >= 1000/////////////////////////////////////////////////////////////////////////////// CTestFontsDlg dialogclass CTestFontsDlg : public CDialog{// Constructionpublic:CTestFontsDlg(CWnd* pParent = NULL); // standard constructor// Dialog Data//{{AFX_DATA(CTestFontsDlg)enum { IDD = IDD_TESTFONTS_DIALOG }; // NOTE: the ClassWizard will add data members here//}}AFX_DATA// ClassWizard generated virtual function overrides//{{AFX_VIRTUAL(CTestFontsDlg)protected:virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support//}}AFX_VIRTUAL// Implementationprotected:HICON m_hIcon;CDC* pDC;HDC hDC;HFONT hFont;private:LOGFONT logFont;CFont m_Font;// Generated message map functions//{{AFX_MSG(CTestFontsDlg)virtual BOOL OnInitDialog();afx_msg void OnPaint();//}}AFX_MSGDECLARE_MESSAGE_MAP()};//{{AFX_INSERT_LOCATION}}// Microsoft eMbedded Visual C++ will insert additional declarations immediately before the previous line.#endif // !defined(AFX_TESTFONTSDLG_H__1128C2BD_CCE9_4A5D_879B_6CEF9EED2824__INCLUDED_)// TestFontsDlg.cpp : implementation file//#include "stdafx.h"#include "TestFonts.h"#include "TestFontsDlg.h"#ifdef _DEBUG#define new DEBUG_NEW#undef THIS_FILEstatic char THIS_FILE[] = __FILE__;#endif/////////////////////////////////////////////////////////////////////////////// CTestFontsDlg dialogCTestFontsDlg::CTestFontsDlg(CWnd* pParent /*=NULL*/): CDialog(CTestFontsDlg::IDD, pParent){//{{AFX_DATA_INIT(CTestFontsDlg) // NOTE: the ClassWizard will add member initialization here//}}AFX_DATA_INIT// Note that LoadIcon does not require a subsequent DestroyIcon in Win32m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);}void CTestFontsDlg::DoDataExchange(CDataExchange* pDX){CDialog::DoDataExchange(pDX);//{{AFX_DATA_MAP(CTestFontsDlg) // NOTE: the ClassWizard will add DDX and DDV calls here//}}AFX_DATA_MAP}BEGIN_MESSAGE_MAP(CTestFontsDlg, CDialog)//{{AFX_MSG_MAP(CTestFontsDlg)ON_WM_PAINT()//}}AFX_MSG_MAPEND_MESSAGE_MAP()/////////////////////////////////////////////////////////////////////////////// CTestFontsDlg message handlersBOOL CTestFontsDlg::OnInitDialog(){CDialog::OnInitDialog();// Set the icon for this dialog. The framework does this automatically// when the application's main window is not a dialogSetIcon(m_hIcon, TRUE); // Set big iconSetIcon(m_hIcon, FALSE); // Set small iconCenterWindow(GetDesktopWindow()); // center to the hpc screen// TODO: Add extra initialization herelogFont.lfHeight = 18;logFont.lfWidth = 10;logFont.lfEscapement = 0;logFont.lfOrientation = 0;logFont.lfWeight = FW_NORMAL;logFont.lfItalic = 0;logFont.lfUnderline = 0;logFont.lfStrikeOut = 0;logFont.lfCharSet = ANSI_CHARSET;logFont.lfOutPrecision = OUT_DEFAULT_PRECIS;logFont.lfClipPrecision = CLIP_DEFAULT_PRECIS;logFont.lfQuality = DEFAULT_QUALITY;logFont.lfPitchAndFamily=VARIABLE_PITCH | FF_SWISS;lstrcpy(logFont.lfFaceName, L"Times New Roman");m_Font.CreateFontIndirect(&logFont);// hFont =CreateFontIndirect(&logFont);// hDC =::GetDC(this->m_hWnd);pDC =GetDC();return TRUE; // return TRUE unless you set the focus to a control}void CTestFontsDlg::OnPaint() {CPaintDC dc(this); // device context for painting// TODO: Add your message handler code herepDC->SelectObject(&m_Font);SetTextCharacterExtra(pDC->m_hDC, 10);pDC->DrawText(_T("Hello"), CRect(20, 20, 200, 50), DT_LEFT);// Do not call CDialog::OnPaint() for painting messages}