Rockwell Automation ControlFLASH Firmware Upgrade Kit User Manual - Manual (Page 47)

Rockwell Automation Publication 1756-UM105E-EN-E - October 2012 47
Create a Custom Interface to Process Firmware Downloads Appendix B
After registering the two messages, an application must override the form's
WndProc method to actually listen for these messages
For more information, see MSDN: http://msdn.microsoft.com/en-us/library/
system.windows.forms.form.wndproc(VS.71).aspx
Example:
Protected Overrides Sub WndProc(ByRef recWinMessage As
Windows.Forms.Message)
In WndProc, you first need to determine if the message received is one of the two
registered ones. This is done by checking (in this example):
recWinMessage.Msg = WM_CF_PROGRESS (as defined in the above example)
or recWinMessage.Msg = WM_CF_COMPLETE
Assuming the message is one of the two, the details of what the message means are
as follows:
· If the message is WM_CFPROGRESS:
recWinMessage.WParam.ToInt32 is the number of the device
currently being flashed. These numbers should correspond to the numbers
listed in the script file
recWinMessage.LParam.ToInt32 is the actual progress of the
current device (as a percentage).
Because of the way the system is designed, if recWinMessage.LParam.ToInt32 is
100, that does not mean the flashing of that device is complete. Flashing is only
complete when the WM_CFCOMPLETE message is sent.
· If the message is WM_CFCOMPLETE:
recWinMessage.WParam.ToInt32 is still the number of the
device
recWinMessage.LParam.ToInt32 indicates success or failure.
If the value is 1, the flash succeeded; if 0, it failed.
For more information, see MSDN http://msdn.microsoft.com/en-us/library/
system.windows.forms.message_members(VS.71).aspx