Declare Function GetDeviceCaps Lib "gdi32" (ByVal hdc As Long, ByVal nIndex As Long) As Long
GetDeviceCaps возвращает информацию о возможностях заданного устройства
В успешном случае возвращается заданная информация
| DRIVERVERSION = 0 | Версия драйвера устройства | ||
| TECHNOLOGY | Технология устройства. Принимает одно из следующих значений | ||
| DT_PLOTTER | плоттер | ||
| DT_RASDISPLAY | растровый дисплей | ||
| DT_RASPRINTER | растровый принтер | ||
| DT_RASCAMERA | растровая камера | ||
| DT_CHARSTREAM | символьный поток | ||
| DT_METAFILE | метафайл | ||
| DT_DISPFILE | Display file | ||
| Если параметр hdc является дескриптором контекста устройства расширенного метафайла, технология устройства is that of the referenced device as specified to the CreateEnhMetaFile. To determine whether it is an enhanced metafile DC, use the GetObjectType function. | |||
| HORZSIZE | Ширина экрана в миллиметрах | ||
| VERTSIZE | Высота экрана в миллиметрах | ||
| HORZRES | Ширина экрана в пикселах | ||
| VERTRES | Высота вывода в пикселах | ||
| LOGPIXELSX | Количество пикселей на логический дюйм по горизонтали | ||
| LOGPIXELSY | Количество пикселей на логический дюйм по вертикали | ||
| BITSPIXEL | Число бит/пиксел | ||
| PLANES | Количество цветовых плоскостей | ||
| NUMBRUSHES | Число кистей устройств | ||
| NUMPENS | Число перьев устройств | ||
| NUMFONTS | Число встроенных шрифтов | ||
| NUMCOLORS | Number of entries in the device's color table, if the device has a color depth of no more than 8 bits per pixel. For devices with greater color depths, – 1 is returned. | ||
| ASPECTX | Relative width of a device pixel used for line drawing. | ||
| ASPECTY | Relative height of a device pixel used for line drawing. | ||
| ASPECTXY | Diagonal width of the device pixel used for line drawing. | ||
| PDEVICESIZE | Reserved. | ||
| CLIPCAPS | Flag that indicates the clipping capabilities of the device. If the device can clip to a rectangle, it is 1. Otherwise, it is 0. | ||
| SIZEPALETTE | Number of entries in the system palette. This index is valid only if the device driver sets the RC_PALETTE bit in the RASTERCAPS index and is available only if the driver is compatible with 16-bit Windows. | ||
| NUMRESERVED | Number of reserved entries in the system palette. This index is valid only if the device driver sets the RC_PALETTE bit in the RASTERCAPS index and is available only if the driver is compatible with 16-bit Windows. | ||
| COLORRES | Actual color resolution of the device, in bits per pixel. This index is valid only if the device driver sets the RC_PALETTE bit in the RASTERCAPS index and is available only if the driver is compatible with 16-bit Windows. | ||
| PHYSICALWIDTH | For printing devices: the width of the physical page, in device units. For example, a printer set to print at 600 dpi on 8.5-x11-inch paper has a physical width value of 5100 device units. Note that the physical page is almost always greater than the printable area of the page, and never smaller. | ||
| PHYSICALHEIGHT | For printing devices: the height of the physical page, in device units. For example, a printer set to print at 600 dpi on 8.5-by-11-inch paper has a physical height value of 6600 device units. Note that the physical page is almost always greater than the printable area of the page, and never smaller. | ||
| PHYSICALOFFSETX | For printing devices: the distance from the left edge of the physical page to the left edge of the printable area, in device units. For example, a printer set to print at 600 dpi on 8.5-by-11-inch paper, that cannot print on the leftmost 0.25-inch of paper, has a horizontal physical offset of 150 device units. | ||
| PHYSICALOFFSETY | For printing devices: the distance from the top edge of the physical page to the top edge of the printable area, in device units. For example, a printer set to print at 600 dpi on 8.5-by-11-inch paper, that cannot print on the topmost 0.5-inch of paper, has a vertical physical offset of 300 device units. | ||
| VREFRESH | Windows NT/2000 or later: For display devices:
the current vertical refresh rate of the device, in cycles per second (Hz).
A vertical refresh rate value of 0 or 1 represents the display hardware's default refresh rate. This default rate is typically set by switches on a display card or computer motherboard, or by a configuration program that does not use Win32 display functions such as ChangeDisplaySettings. | ||
| SCALINGFACTORX | Scaling factor for the x-axis of the printer. | ||
| SCALINGFACTORY | Scaling factor for the y-axis of the printer. | ||
| BLTALIGNMENT | Windows NT/2000 or later: Preferred horizontal drawing alignment, expressed as a multiple of pixels. For best drawing performance, windows should be horizontally aligned to a multiple of this value. A value of zero indicates that the device is accelerated, and any alignment may be used. | ||
| SHADEBLENDCAPS | Windows 98/Me, Windows 2000 or later: Value that indicates the shading and blending capabilities of the device. | ||
| SB_CONST_ALPHA | Handles the SourceConstantAlpha member of the BLENDFUNCTION structure, which is referenced by the blendFunction parameter of the AlphaBlend function. | ||
| SB_GRAD_RECT | Capable of doing GradientFill rectangles. | ||
| SB_GRAD_TRI | Capable of doing GradientFill triangles. | ||
| SB_NONE | Device does not support any of these capabilities. | ||
| SB_PIXEL_ALPHA | Capable of handling per-pixel alpha in AlphaBlend. | ||
| SB_PREMULT_ALPHA | Capable of handling premultiplied alpha in AlphaBlend. | ||
| RASTERCAPS | Value that indicates the raster capabilities of the device, as shown in the following table. | ||
| RC_BANDING | Requires banding support. | ||
| RC_BITBLT | Capable of transferring bitmaps. | ||
| RC_BITMAP64 | Capable of supporting bitmaps larger than 64 KB. | ||
| RC_DI_BITMAP | Capable of supporting the SetDIBits and GetDIBits functions. | ||
| RC_DIBTODEV | Capable of supporting the SetDIBitsToDevice function. | ||
| RC_FLOODFILL | Capable of performing flood fills. | ||
| RC_GDI20_OUTPUT | Capable of supporting features of 16-bit Windows 2.0. | ||
| RC_PALETTE | Specifies a palette-based device. | ||
| RC_SCALING | Capable of scaling. | ||
| RC_STRETCHBLT | Capable of performing the StretchBlt function. | ||
| RC_STRETCHDIB | Capable of performing the StretchDIBits function. | ||
| CURVECAPS | Value that indicates the curve capabilities of the device, as shown in the following table: | ||
| CC_NONE | Device does not support curves. | ||
| CC_CHORD | Device can draw chord arcs. | ||
| CC_CIRCLES | Device can draw circles. | ||
| CC_ELLIPSES | Device can draw ellipses. | ||
| CC_INTERIORS | Device can draw interiors. | ||
| CC_PIE | Device can draw pie wedges. | ||
| CC_ROUNDRECT | Device can draw rounded rectangles. | ||
| CC_STYLED | Device can draw styled borders. | ||
| CC_WIDE | Device can draw wide borders. | ||
| CC_WIDESTYLED | Device can draw borders that are wide and styled. | ||
| LINECAPS | Value that indicates the line capabilities of the device, as shown in the following table: | ||
| LC_NONE | Device does not support lines. | ||
| LC_INTERIORS | Device can draw interiors. | ||
| LC_MARKER | Device can draw a marker. | ||
| LC_POLYLINE | Device can draw a polyline. | ||
| LC_POLYMARKER | Device can draw multiple markers. | ||
| LC_STYLED | Device can draw styled lines. | ||
| LC_WIDE | Device can draw wide lines. | ||
| LC_WIDESTYLED | Device can draw lines that are wide and styled. | ||
| POLYGONALCAPS | Value that indicates the polygon capabilities of the device, as shown in the following table. | ||
| PC_NONE | Device does not support polygons. | ||
| PC_INTERIORS | Device can draw interiors. | ||
| PC_POLYGON | Device can draw alternate-fill polygons. | ||
| PC_RECTANGLE | Device can draw rectangles. | ||
| PC_SCANLINE | Device can draw a single scanline. | ||
| PC_STYLED | Device can draw styled borders. | ||
| PC_WIDE | Device can draw wide borders. | ||
| PC_WIDESTYLED | Device can draw borders that are wide and styled. | ||
| PC_WINDPOLYGON | Device can draw winding-fill polygons. | ||
| TEXTCAPS | Value that indicates the text capabilities of the device, as shown in the following table. | ||
| TC_OP_CHARACTER | Device is capable of character output precision. | ||
| TC_OP_STROKE | Device is capable of stroke output precision. | ||
| TC_CP_STROKE | Device is capable of stroke clip precision. | ||
| TC_CR_90 | Device is capable of 90-degree character rotation. | ||
| TC_CR_ANY | Device is capable of any character rotation. | ||
| TC_SF_X_YINDEP | Device can scale independently in the x- and y-directions. | ||
| TC_SA_DOUBLE | Device is capable of doubled character for scaling. | ||
| TC_SA_INTEGER | Device uses integer multiples only for character scaling. | ||
| TC_SA_CONTIN | Device uses any multiples for exact character scaling. | ||
| TC_EA_DOUBLE | Device can draw double-weight characters. | ||
| TC_IA_ABLE | Device can italicize. | ||
| TC_UA_ABLE | Device can underline. | ||
| TC_SO_ABLE | Device can draw strikeouts. | ||
| TC_RA_ABLE | Device can draw raster fonts. | ||
| TC_VA_ABLE | Device can draw vector fonts. | ||
| TC_RESERVED | Reserved; must be zero. | ||
| TC_SCROLLBLT | Device cannot scroll using a bit-block transfer. Note that this meaning may be the opposite of what you expect. | ||
| COLORMGMTCAPS | Windows 2000 or later: Value that indicates the color management capabilities of the device. | ||
| CM_CMYK_COLOR | Device can accept CMYK color space ICC color profile. | ||
| CM_DEVICE_ICM | Device can perform ICM on either the device driver or the device itself. | ||
| CM_GAMMA_RAMP | Устройство поддерживает GetDeviceGammaRamp и SetDeviceGammaRamp | ||
| CM_NONE | Устройство не поддерживает ICM | ||
Dim lRet As Long Dim P As POINTAPI ' Получим информацию о размерах экрана ' и найдем его центр P.x = GetDeviceCaps(Form1.hdc, HORZRES) / 2 P.y = GetDeviceCaps(Form1.hdc, VERTRES) / 2 ' Установим курсор мыши в центр экрана lRet = SetCursorPos(P.x, P.y)