Using Win32 functions in Visual FoxPro Image Gallery
Code examples:
GDI+: Storing content of the Clipboard to a bitmap file
GDI+: copying to the Clipboard (a) image of active FoxPro window/form, (b) image file
GDI+: saving image of FoxPro form to graphics file (BMP, GIF, JPG, PNG, TIF)
How to change display settings: screen resolution, screen refresh rate
Custom GDI+ class
Simple MAPI: how to resolve a name to unique address list entry
Capturing keyboard activity of another application with the Raw Input API (VFP9)
Using Video Capture: displaying on FoxPro form frames and previewing video obtained from a digital camera
GDI+: Implementing image scrolling with inertia
Using FoxTray ActiveX control: System Tray Icon and menu attached to VFP form
Storing content of the Clipboard to a bitmap file
How to convert a bitmap file to monochrome format (1 bpp)
Retrieving the name of the primary domain controller (PDC) and join status information
GDI+: custom Clock Control
GetFileOwner - Get the owner of an NTFS file
Copying picture of the active form to the Clipboard using Enhanced Metafile API functions
How to detect if additional monitor is connected and active
Winsock: sending email messages (SMTP, port 25)
How to change the name and the size of the font in the MessageBox dialog
The SQLGetProp() creates a bridge between Visual FoxPro and the ODBC API
Enumerating raw input devices attached to the system (keyboard, mouse, human interface device)
Custom HttpRequest class (WinHTTP)
Using EnumPrinters function to enumerate locally installed printers
How to register custom Event Log source
Enhanced GetFont dialog

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Before you begin:
Comparing to the dialog invoked by the GETFONT(), this one offers few more adjustable parameters: strikeout and underline effects and font color.


See also:
  • GDI+: enumerating fonts installed on the system
  • How to change font name and size in the MessageBox dialog
  • How to position the GETPRINTER() dialog
  • Vertical Label control
  • DO decl 
    
    #DEFINE GMEM_FIXED                 0
    #DEFINE LF_FACESIZE               32
    #DEFINE FW_NORMAL                400
    #DEFINE DEFAULT_CHARSET            1
    #DEFINE OUT_DEFAULT_PRECIS         0
    #DEFINE CLIP_DEFAULT_PRECIS        0
    #DEFINE DEFAULT_QUALITY            0
    #DEFINE DEFAULT_PITCH              0
    #DEFINE CF_SCREENFONTS             1
    #DEFINE CF_INITTOLOGFONTSTRUCT    64
    #DEFINE CF_EFFECTS               256
    #DEFINE CF_FORCEFONTEXIST      65536
    
    *| typedef struct { 
    *|   DWORD        lStructSize;     4
    *|   HWND         hwndOwner;       4
    *|   HDC          hDC;             4
    *|   LPLOGFONT    lpLogFont;       4
    *|   INT          iPointSize;      4
    *|   DWORD        Flags;           4
    *|   COLORREF     rgbColors;       4
    *|   LPARAM       lCustData;       4
    *|   LPCFHOOKPROC lpfnHook;        4
    *|   LPCTSTR      lpTemplateName;  4
    *|   HINSTANCE    hInstance;       4
    *|   LPTSTR       lpszStyle;       4
    *|   WORD         nFontType;       2
    *|   WORD         ___MISSING_ALIGNMENT__; 2
    *|   INT          nSizeMin;        4
    *|   INT          nSizeMax;        4
    *| } CHOOSEFONT, *LPCHOOSEFONT; total: 60 bytes
    
    *| typedef struct tagLOGFONT { 
    *|   LONG lfHeight;                   4
    *|   LONG lfWidth;                    4
    *|   LONG lfEscapement;               4
    *|   LONG lfOrientation;              4
    *|   LONG lfWeight;                   4
    *|   BYTE lfItalic;                   1
    *|   BYTE lfUnderline;                1
    *|   BYTE lfStrikeOut;                1
    *|   BYTE lfCharSet;                  1
    *|   BYTE lfOutPrecision;             1
    *|   BYTE lfClipPrecision;            1
    *|   BYTE lfQuality;                  1
    *|   BYTE lfPitchAndFamily;           1 
    *|   TCHAR lfFaceName[LF_FACESIZE];  32
    *| } LOGFONT, *PLOGFONT; total: 60 bytes
    
        LOCAL lcChooseFont, lcLogFont, hLogFont, lcFontFace
    
        * initializing LOGFONT structure:
        * Times New Roman, Italic
        lcLogFont = num2dword(16) +;
            num2dword(0)  +;
            num2dword(0)  +;
            num2dword(0)  +;
            num2dword(FW_NORMAL) +;
            Chr(1) +;
            Chr(0) +;
            Chr(0) +;
            Chr(DEFAULT_CHARSET)     +;
            Chr(OUT_DEFAULT_PRECIS)  +;
            Chr(CLIP_DEFAULT_PRECIS) +;
            Chr(DEFAULT_QUALITY)     +;
            Chr(DEFAULT_PITCH)       +;
            PADR("Times New Roman"+Chr(0),32)
    
        * copying the LOGFONT data into the global memory object
        * because CHOOSEFONT structure uses the pointer
        lnLogFontSize = 60
        hLogFont = GlobalAlloc(GMEM_FIXED, lnLogFontSize)
    
        * this function is re-declared below
        * with different parameter types
        DECLARE RtlMoveMemory IN kernel32 As String2Heap;
            INTEGER Destination, STRING @ Source,;
            INTEGER nLength
        = String2Heap (hLogFont, @lcLogFont, lnLogFontSize)
    
        * initializing CHOOSEFONT structure
        lcChooseFont = num2dword(60) +;
            num2dword(0) +;
            num2dword(0) +;
            num2dword(hLogFont) +;
            num2dword(0) +;
            num2dword(CF_SCREENFONTS + CF_EFFECTS +;
                CF_INITTOLOGFONTSTRUCT + CF_FORCEFONTEXIST) +;
            num2dword(0) +;
            num2dword(0) +;
            num2dword(0) +;
            num2dword(0) +;
            num2dword(0) +;
            num2dword(0) +;
            num2dword(0) +;
            num2dword(0) +;
            num2dword(0)
    
        IF ChooseFont (@lcChooseFont) <> 0
        * displaying selection
            * re-declaring API function with different parameters
            DECLARE RtlMoveMemory IN kernel32 As Heap2String;
                STRING @Dest, INTEGER Source, INTEGER nLength
    
            * copying data from the global memory object to VFP string
            = Heap2String (@lcLogFont, hLogFont, lnLogFontSize)
    
            ? "*** CHOOSEFONT Structure:"
            ? "Point size:", buf2dword(SUBSTR(lcChooseFont, 17,4))
            ? "RGB color: ", buf2dword(SUBSTR(lcChooseFont, 25,4))
    
            ?
            ? "*** LOGFONT Structure:"
            ? "Font Weight:", buf2dword(SUBSTR(lcLogFont, 17,4))
            ? "Italic:     ", Iif(Asc(SUBSTR(lcLogFont, 21,1))=0, "No","Yes")
            ? "Underline:  ", Iif(Asc(SUBSTR(lcLogFont, 22,1))=0, "No","Yes")
            ? "Strikeout:  ", Iif(Asc(SUBSTR(lcLogFont, 23,1))=0, "No","Yes")
    
            lcFontFace = SUBSTR(lcLogFont, 29)
            lcFontFace = SUBSTR(lcFontFace, 1, AT(Chr(0),lcFontFace)-1)
            ? "Font Face:  ", lcFontFace
        ENDIF
    
        * releasing system resources
        = GlobalFree (hLogFont)
    RETURN
    
    PROCEDURE  decl
        DECLARE INTEGER ChooseFont IN comdlg32 STRING @lpcf
        DECLARE INTEGER GlobalFree IN kernel32 INTEGER hMem
        DECLARE INTEGER GlobalAlloc IN kernel32;
            INTEGER wFlags,;
            INTEGER dwBytes
    
    FUNCTION  num2dword (lnValue)
    #DEFINE m0       256
    #DEFINE m1     65536
    #DEFINE m2  16777216
        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)
    
    FUNCTION  buf2dword (lcBuffer)
    RETURN Asc(SUBSTR(lcBuffer, 1,1)) + ;
        Asc(SUBSTR(lcBuffer, 2,1)) * 256 +;
        Asc(SUBSTR(lcBuffer, 3,1)) * 65536 +;
        Asc(SUBSTR(lcBuffer, 4,1)) * 16777216
    
    

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    4817 bytes  
    Created: 2001-09-20 12:00:00  
    Modified: 2009-02-25 15:22:31  
    Visits in 7 days: 42  
    Listed functions:
    ChooseFont
    GlobalAlloc
    GlobalFree
    Printer friendly API declarations
    My comment:
    GETFONT(cFontName [, nFontSize [, cFontStyle [, nFontCharSet])
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