short Escape(hdc, EXT_DEVICE_CAPS, sizeof(int),lpIndex,lpCaps)The EXT_DEVICE_CAPS printer escape retrieves information about device-specific capabilities. It supplements the GetDeviceCaps function.
hdc
HDC Identifies the device context.
lpIndex
LPINT Points to a short integer that specifies the index of the capability to be retrieved. It can be any one of the following values:
| Value | Meaning |
| R2_CAPS (1) | The lpCaps parameter indicates which of the 16 binary raster operations the device driver supports. A bit will be set for each supported raster operation. For further information, see the description of the SetROP2 function in the Microsoft Windows Programmer's Reference, Volume 2. |
| PATTERN_CAPS (2) | The lpCaps parameter returns the maximum dimensions of a pattern brush bitmap. The low-order word of the capability value contains the maximum width of a pattern brush bitmap, and the high-order word contains the maximum height. |
| PATH_CAPS (3) | The lpCaps parameter indicates whether the device is capable of creating paths by using alternate and winding interiors, and whether the device can do exclusive or inclusive clipping to path interiors. The path capabilities are obtained by using the logical OR operation on the following values: |
| PATH_ALTERNATE (1) PATH_WINDING (2) PATH_INCLUSIVE (4) PATH_EXCLUSIVE (8) | |
| POLYGON_CAPS (4) | The lpCaps parameter returns the maximum number of polygon points supported by the device. The capability value is an unsigned value specifying the maximum number of points. |
| PATTERN_COLOR_CAPS (5) | The lpCaps parameter indicates whether the device can convert monochrome pattern bitmaps to color. The capability value is 1 if the device can do pattern bitmap color conversions and zero if it cannot. |
| R2_TEXT_CAPS (6) | The lpCaps parameter indicates whether the device is capable of performing binary raster operations on text. The low-order word of the capability value specifies which raster operations are supported for text. A bit is set for each supported raster operation, as in the R2_CAPS escape. The high-order word specifies the type of text to which the raster capabilities apply. It is obtained by applying the logical OR operation to the following values together: |
| RASTER_TEXT (1) DEVICE_TEXT (2) VECTOR_TEXT (4) | |
| POLYMODE_CAPS (7) | The lpcaps parameter indicates which poly modes are supported by the printer driver. The capability value is obtained by using the bitwise OR operator to combine a bit in the corresponding position for each supported poly mode. For example, if the printer supports the PM_POLYSCANLINE and PM_BEZIER poly modes, the capability value would be: |
| (1 << PM_POLYSCANLINE) | (PM_BEZIER) |
lpCaps
LPDWORD Points to a 32-bit integer to which the capabilities will be copied.
The return value is nonzero if the specified extended capability is supported. This value is zero if the capability is not supported.
This escape is used only by PostScript printer drivers.