imaqOverlayMetafile

NI Vision for LabWindows/CVI Function

imaqOverlayMetafile

Usage

int imaqOverlayMetafile(Image* image, const void* metafile, Rect rect, const char* group);

Purpose

Overlays a metafile onto an image.

Image Types Supported

IMAQ_IMAGE_U8, IMAQ_IMAGE_U16, IMAQ_IMAGE_I16, IMAQ_IMAGE_SGL, IMAQ_IMAGE_COMPLEX, IMAQ_IMAGE_RGB, IMAQ_IMAGE_HSL, IMAQ_IMAGE_RGB_U64

Parameters

Name

Type

Description

image Image* The image on which to overlay the metafile.
metafile const void* The Windows handle to the metafile that you want to convert into an overlay. The handle may be either an HMETAFILE or HENHMETAFILE. This parameter is required and cannot be NULL.
rect Rect The location of rectangular region within the image that the function overlays the metafile. To use the bounding rectangle information stored in the metafile, set this parameter to IMAQ_NO_RECT.
group const char* The group to which you want to add the overlay. Set this parameter to NULL to add the overlay to the default group.

Return Value

Type

Description

int On success, this function returns a non-zero value. On failure, this function returns 0. To get extended error information, call imaqGetLastError().