Using Win32 functions in Visual FoxPro Image Gallery
Code examples:
Custom GDI+ class
Storing content of the Clipboard to a bitmap file
Displaying icons in the system tray (VFP9)
Storing screen shot of a form to bitmap file
How to print FoxPro form
How to print a bitmap file
Capturing keyboard activity of another application with the Raw Input API (VFP9)
GDI+: Implementing image scrolling with inertia
Obtaining names and positions for shortcuts located on the Windows Desktop
Monitoring clipboard content changes (VFP9)
Browsing Windows Known Folders (Special Folders)
Using the LoadImage function to have a bitmap file loaded and displayed on VFP main window
GDI+: reading and writing metadata in JPEG and TIFF files
Using NetWkstaTransportEnum to obtain MAC Address of remote server
Enumerating Processes -- WinNT
Displaying dimmed window behind VFP top-level form
Pocket PC: custom RAPI class for operating with files and folders on mobile device
HOWTO: Use the Win32 API to Access File Dates and Times
Using InternetSetFilePointer when resuming interrupted download from the Internet
How to view icons stored in executable files (Icon Viewer) - II
Printing Image File, programmatically set print page orientation to landscape
Attaching menu to a top-level form
Enumerating devices installed on the local machine
How to change display settings: screen resolution, screen refresh rate
How to find which fonts Windows uses for drawing captions, menus and message boxes

User rating: 0/10 (0 votes)
Rate this code sample:
  • ~
More code examples    Listed functions    Add comment     W32 Constants      Translate this page Printer friendly version of this code sample
Versions:
click to open
Before you begin:
Calling SystemParametersInfo with SPI_GETNONCLIENTMETRICS input parameter populates the NONCLIENTMETRICS structure.

This structure contains the metrics associated with the nonclient area of a nonminimized window. Among the metrics included are the settings for 5 fonts (LOGFONT structures), the OS uses for drawing captions, small captions, menus, status bars and message boxes.

See also:
  • Displaying icons and descriptions associated with files and folders
  • #DEFINE SPI_GETNONCLIENTMETRICS 0x0029
    #DEFINE NONCLIENTMETRICS_SIZE 0x0154
    #DEFINE LOGFONT_SIZE 0x003c
    #DEFINE LOGPIXELSY 0x005a
    
    DO declare
    
    LOCAL cNonClientMetrics, cLogFont
    
    * populating NONCLIENTMETRICS structure
    * the size of the structure occupies first 4 bytes
    cNonClientMetrics=num2dword(NONCLIENTMETRICS_SIZE)
    
    * padding the structure to the required size
    cNonClientMetrics=PADR(cNonClientMetrics,;
        NONCLIENTMETRICS_SIZE, CHR(0))
    
    * retrieving the metrics associated with the nonclient area
    * of nonminimized windows
    IF SystemParametersInfo(SPI_GETNONCLIENTMETRICS,;
        NONCLIENTMETRICS_SIZE, @cNonClientMetrics, 0) = 0
    
        ? "SystemParametersInfo call failed:", GetLastError()
        RETURN
    ENDIF
    
    * among other metrics, populated NONCLIENTMETRICS structure
    * contains data for 5 fonts used for drawing:
    * captions, small captions, menus, status bar and message boxes
    LOCAL oCaptionFont As clsLogFont, oSmCaptionFont As clsLogFont,;
        oMenuFont As clsLogFont, oStatusFont As clsLogFont,;
        oMessageFont As clsLogFont
    
    oCaptionFont = CREATEOBJECT("clsLogFont",;
        SUBSTR(cNonClientMetrics, 25, LOGFONT_SIZE))
    
    oSmCaptionFont = CREATEOBJECT("clsLogFont",;
        SUBSTR(cNonClientMetrics, 93, LOGFONT_SIZE))
    
    oMenuFont = CREATEOBJECT("clsLogFont",;
        SUBSTR(cNonClientMetrics, 161, LOGFONT_SIZE))
    
    oStatusFont = CREATEOBJECT("clsLogFont",;
        SUBSTR(cNonClientMetrics, 221, LOGFONT_SIZE))
    
    oMessageFont = CREATEOBJECT("clsLogFont",;
        SUBSTR(cNonClientMetrics, 281, LOGFONT_SIZE))
    
    * Vista: Segoe UI, 9, N, 1
    * WinXP: Tahoma, 9, N, 1
    ? oMessageFont.GetFontDesc()
    * end of main
    
    PROCEDURE declare
        DECLARE INTEGER GetLastError IN kernel32
        DECLARE INTEGER GetWindowDC IN user32 INTEGER hWindow
    
        DECLARE INTEGER SystemParametersInfo IN user32;
            INTEGER uiAction, INTEGER uiParam,;
            STRING @pvParam, INTEGER fWinIni
    
        DECLARE INTEGER GetDeviceCaps IN gdi32;
            INTEGER hdc, INTEGER nIndex
    
        DECLARE INTEGER ReleaseDC IN user32;
            INTEGER hWindow, INTEGER hDC
    
    FUNCTION buf2dword(cBuffer)
    RETURN Asc(SUBSTR(cBuffer, 1,1)) + ;
        BitLShift(Asc(SUBSTR(cBuffer, 2,1)),  8) +;
        BitLShift(Asc(SUBSTR(cBuffer, 3,1)), 16) +;
        BitLShift(Asc(SUBSTR(cBuffer, 4,1)), 24)
    
    FUNCTION num2dword(lnValue)
    #DEFINE m0 0x0000100
    #DEFINE m1 0x0010000
    #DEFINE m2 0x1000000
        IF lnValue < 0
            lnValue = 0x100000000 + lnValue
        ENDIF
        LOCAL b0, b1, b2, b3
        b3 = Int(lnValue/m2)
        b2 = Int((lnValue - b3*m2)/m1)
        b1 = Int((lnValue - b3*m2 - b2*m1)/m0)
        b0 = Mod(lnValue, m0)
    RETURN Chr(b0)+Chr(b1)+Chr(b2)+Chr(b3)
    
    DEFINE CLASS clsLogFont As Relation
    * implements LOGFONT structure
        lfHeight=0
        lfWidth=0
        lfEscapement=0
        lfOrientation=0
        lfWeight=0
        lfItalic=.F.
        lfUnderline=.F.
        lfStrikeOut=.F.
        lfCharSet=0
        lfOutPrecision=0
        lfClipPrecision=0
        lfQuality=0
        lfPitchAndFamily=0
        lfFaceName=""
    
    PROCEDURE Init(cBuf As String)
        WITH THIS
            .lfHeight=buf2dword(SUBSTR(cBuf,1,4))
            .lfWidth=buf2dword(SUBSTR(cBuf,5,4))
            .lfEscapement=buf2dword(SUBSTR(cBuf,9,4))
            .lfOrientation=buf2dword(SUBSTR(cBuf,13,4))
            .lfWeight=buf2dword(SUBSTR(cBuf,17,4))
            .lfItalic = (ASC(SUBSTR(cBuf,21,1)) <> 0)
            .lfUnderline = (ASC(SUBSTR(cBuf,22,1)) <> 0)
            .lfStrikeOut = (ASC(SUBSTR(cBuf,23,1)) <> 0)
            .lfCharSet=ASC(SUBSTR(cBuf,24,1))
            .lfOutPrecision=ASC(SUBSTR(cBuf,25,1))
            .lfClipPrecision=ASC(SUBSTR(cBuf,26,1))
            .lfQuality=ASC(SUBSTR(cBuf,27,1))
            .lfPitchAndFamily=ASC(SUBSTR(cBuf,28,1))
            .lfFaceName=STRTRAN(SUBSTR(cBuf,29,32), CHR(0),"")
        ENDWITH
    
    PROCEDURE GetFontDesc() As String
    * returns GETFONT() style description for the font:
    * cFontName, nFontSize, cFontStyle, nFontCharSet
    WITH THIS
        LOCAL cFontStyle, nFontSize
        cFontStyle=""
        cFontStyle=cFontStyle+IIF(.lfWeight > 400, "B", "")
        cFontStyle=cFontStyle+IIF(.lfItalic, "I", "")
        cFontStyle=cFontStyle+IIF(.lfUnderline, "U", "")
        cFontStyle=cFontStyle+IIF(.lfStrikeOut, "S", "")
        cFontStyle=IIF(EMPTY(cFontStyle), "N", cFontStyle)
    
        RETURN .lfFaceName + ", " +;
            TRANSFORM(.GetFontSize()) + ", " +;
            m.cFontStyle + ", " + TRANSFORM(.lfCharSet)
    
    ENDWITH
    
    FUNCTION GetFontSize() As Number
    * converts the font height to font size;
    * note that in this particular case the font height is a negative value
        LOCAL hWindow, hDC, nPxPerInchY
        hWindow=_screen.HWnd
        hDC=GetWindowDC(hWindow)
        nPxPerInchY = GetDeviceCaps(hDC, LOGPIXELSY)
        ReleaseDC(hWindow, hDC)
    RETURN ROUND((ABS(THIS.lfHeight) * 72) / nPxPerInchY, 0)
    
    ENDDEFINE
    

    User rating: 0/10 (0 votes)
    Rate this code sample:
    • ~
    4487 bytes  
    Created: 2009-11-21 22:21:09  
    Modified: 2009-12-09 10:58:43  
    Visits in 7 days: 125  
    Listed functions:
    GetDeviceCaps
    GetLastError
    GetWindowDC
    ReleaseDC
    SystemParametersInfo
    Printer friendly API declarations
    My comment:
    Normally all 5 fonts have identical settings.
    Vista: Segoe UI, 9, N, 1
    WinXP: Tahoma, 9, N, 1
    Word Index links for this example:
    Translate this page:
      Spanish    Portuguese    German    French    Italian  
    FreeTranslation.com offers instant, free translations of text or web pages.
    User Contributed Notes:
    There are no notes on this subject.


    Copyright 2001-2017 News2News, Inc. Before reproducing or distributing any data from this site please ask for an approval from its owner. Unless otherwise specified, this page is for your personal and non-commercial use. The information on this page is presented AS IS, meaning that you may use it at your own risk. Microsoft Visual FoxPro and Windows are trade marks of Microsoft Corp. All other trademarks are the property of their respective owners. 

    Privacy policy
    Credits: PHP (4.4.9), an HTML-embedded scripting language, MySQL (5.6.38), the Open Source standard SQL database, AceHTML Freeware Version 4, freeware HTML Editor of choice.   Hosted by Korax Online Inc.
    Last Topics Visited (54.156.92.243)
    12 sec.Solutions
    22 sec.Function: 'GetFileSizeEx'
    Function group: 'File System'
    33 sec.Function: 'IsWow64Process'
    Function group: 'Process and Thread'
    45 sec.Function: 'SetupDiGetClassImageListEx'
    Function group: 'Setup API functions'
    57 sec.Example: 'How to print picture stored in enhanced-format metafile (*.emf)'
    1.13 min.Solutions
    1.32 min.Function: 'PlayEnhMetaFile'
    Function group: 'Metafile'
    1.5 min.Function: 'FindCloseChangeNotification'
    Function group: 'File Management'
    1.67 min.
    Function group: 'ODBC API'
    1.83 min.Function: 'waveInClose'
    Function group: 'Windows Multimedia'
    Google
    Advertise here!