POSTMESSAGE : WIN 32 API in C#

Question

Hi All, Am using POSTMESSAGE WIN 32 API in c# to send message to Window. now 0x0010is the code for WM_CLOSE, i want to find out the code for other notification messages . How can i find out the code 2. Is there a better implementation than passing the code like below. PostMessage( ,0x0010/*WM_CLOSE*/,0,0); Any help regd this is greatly appreciated. Maharaj