This is getting me pissed off, I cant pass WPARAM to another function. I have my standard function: LRESULT CALLBACK WindowProc (HWND hWnd, unsigned uMsg, WPARAM wParam, LPARAM lParam) { } notice the WPARAM wParam in there, and it works fine. but if I want to pass that wParam to another function like: LRESULT CALLBACK WindowProc (HWND hWnd, unsigned uMsg, WPARAM wParam, LPARAM lParam) { MyFunction (wParam); } void MyFunction(WPARAM wParam) { //what ever in here } from the the function MyFunction I get the error error C2275: ''WPARAM'' : illegal use of this type as an expression I keep getting this damn thing! and its pissing me off hehe. Why does it work just fine the windows message handler function but now mine? Possibility

I got to say.. I tried it and no complaints from the VC 6 compilier, even at level 4 warning

Is Function declared before you called it??. ie extern..

Now, I dont have any types, hehe.

Here is what I have:

class EVENTS_WINDOW{public:  void Message_Handler (WPARAM);};extern class EVENTS_WINDOW Events_Window; 

and I also have
class EVENTS_WINDOW Events_Window;
in my main.cpp just like my 200 other classes which all work fine.

and then in

//-------- windows message handler --------------//LRESULT CALLBACKWindowProc (HWND hWnd, unsigned uMsg, WPARAM wParam, LPARAM lParam){	switch (uMsg)	{	case WM_DESTROY:		Cleanup();		PostQuitMessage(0);		break;	//get the mouse coordinates	case WM_MOUSEMOVE:		previous_mouse_x = mouse_x;		previous_mouse_y = mouse_y;		mouse_x = LOWORD(lParam);//x is contained in the lower 16 bits		mouse_y = HIWORD(lParam);//y is contained in the upper 16 bits		mouse_x_difference = mouse_x - previous_mouse_x;		mouse_y_difference = mouse_y - previous_mouse_y;		break;	//the mouse buttons	case WM_LBUTTONDOWN:		GUI.bMouseButtonDown[0] = TRUE;		GUI.buttonDown();		break;	case WM_LBUTTONUP:		GUI.bMouseButtonDown[0] = FALSE;		GUI.buttonUp();		break;	case WM_RBUTTONDOWN:		GUI.bMouseButtonDown[1] = TRUE;		GUI.buttonDown();		break;	case WM_RBUTTONUP:		GUI.bMouseButtonDown[1] = FALSE;		GUI.buttonUp();		break;	case WM_LBUTTONDBLCLK:		break;	//the keyboard keys	case WM_KEYDOWN:                     Events_Window.Message_Handler(wParam);                     break;		default:		return DefWindowProc (hWnd, uMsg, wParam, lParam);	}	return 0L;}    

Now I only get the error at the point in the class Events_Window where I declare the Message_Handler member function.
error C2275: 'WPARAM' : illegal use of this type as an expression

I cant figure out for the life of me why this wont work.

Possibility

Edited by - Possibility on June 2, 2000 1:53:58 PM