You could do it by bundling the freely distributable PowerPoint Viewer with your BlitzPlus application that your program can call, and by using switches, you can tell PowerPoint viewer what to do at startup.
PowerPoint Viewer 2003 Switches
Example:
However, the PowerPoint Viewer files will need to be in the same directory as your EXE.
PowerPoint Viewer 2003 Switches
Example:
ExecFile( "pptview.exe " + Chr(34) + "C:\mypowerpointfile.ppt" + Chr(34)) ;Show mypowerpointfile.ppt using PowerPoint viewer
However, the PowerPoint Viewer files will need to be in the same directory as your EXE.