Change text and lines from Black to White

Another question (just posted a problem with PDF output - this is a different question.):

Besides generating PDFs for producing silk-screens I'm also generating PNGs or JPGs for renderings within Solidworks.

I create the silk-screens in CorelDraw using Black for the lines and text.   But the ink will be printed white on a grey painted surface and I want to bring them into Solidworks as white lines and text.  If I take the Corel jpg (or png) out as Black text and lines and import into Solidworks I get this, which is not what I want:

How can I change the text and lines to white as I am using File > Export in CorelDraw?