- 1 year ago
Getting the numeric value of a given Windows message identifier
To get the numeric value of a given Windows message identifier in Delphi, you can use the RegisterWindowMessage
function from the Windows
unit. Here's an example:
delphiuses
Windows;
function GetMessageIdentifier(const MessageName: string): UINT;
begin
Result := RegisterWindowMessage(PChar(MessageName));
end;
In this example, the GetMessageIdentifier
function takes a MessageName
parameter, which is the name of the Windows message you want to get the numeric value for. It calls the RegisterWindowMessage
function, passing the message name as a parameter.
The RegisterWindowMessage
function retrieves the unique numeric identifier associated with the given message name. If the message name is not already registered, it registers it and returns the identifier.
You can call this function passing the desired message name as a string to obtain its corresponding numeric value.
Here's an example usage:
delphivar
MessageID: UINT;
begin
MessageID := GetMessageIdentifier('WM_MY_CUSTOM_MESSAGE');
ShowMessage(IntToStr(MessageID));
end;
Replace 'WM_MY_CUSTOM_MESSAGE'
with the actual name of the Windows message you want to get the numeric value for. The MessageID
variable will contain the numeric value of the specified Windows message.
Note that the message name should be in the form of 'WM_XXX'
, where 'XXX'
is the name of the message. This convention is commonly used for custom messages in Windows programming.