Hrm, you've posted this in the LabWindows/CVI forum. Which is different from LabVIEW, however the terminology you are using sounds like you're using LabVIEW. Anyhow, I'll answer the question for both languages.
For LabWindows/CVI:
Use the DisplayImageFile function or the SetCtrlBitmap function.
For LabVIEW:
Use the appropriate read image file function from the Graphics Format Palette, for example, use Read BMP File.vi to read a bitmap file. Once you've read the file, wire the image data into the Draw Flattened Bitmap.vi and wire the output of that to your picture control.
Hope that helps,
Ryan K.
